Rule2023-01001

Factoring Criteria for Firearms With Attached “Stabilizing Braces”

Primary source

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Published
January 31, 2023
Effective
January 31, 2023

Issuing agencies

Justice DepartmentAlcohol, Tobacco, Firearms, and Explosives Bureau

Abstract

The Department of Justice ("Department" or "DOJ") is amending the regulations of the Bureau of Alcohol, Tobacco, Firearms, and Explosives ("ATF") to clarify when a rifle is designed, made, and intended to be fired from the shoulder. Specifically, under the Gun Control Act of 1968 ("GCA") and the National Firearms Act of 1934 ("NFA") the definition of "rifle" shall include a weapon that is equipped with an accessory, component, or other rearward attachment (e.g., a "stabilizing brace") that provides surface area that allows the weapon to be fired from the shoulder, provided other factors, as described in this preamble and in the amended regulations, indicate that the weapon is designed, made, and intended to be fired from the shoulder.

Full Text

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<title>Federal Register, Volume 88 Issue 20 (Tuesday, January 31, 2023)</title>
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[Federal Register Volume 88, Number 20 (Tuesday, January 31, 2023)]
[Rules and Regulations]
[Pages 6478-6575]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-01001]



[[Page 6477]]

Vol. 88

Tuesday,

No. 20

January 31, 2023

Part III





Department of Justice





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Bureau of Alcohol, Tobacco, Firearms, and Explosives





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27 CFR Parts 478 and 479





Factoring Criteria for Firearms With Attached ``Stabilizing Braces''; 
Final Rule

Federal Register / Vol. 88 , No. 20 / Tuesday, January 31, 2023 / 
Rules and Regulations

[[Page 6478]]


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DEPARTMENT OF JUSTICE

Bureau of Alcohol, Tobacco, Firearms, and Explosives

27 CFR Parts 478 and 479

[Docket No. ATF 2021R-08F; AG Order No. 5589-2023]
RIN 1140-AA55


Factoring Criteria for Firearms With Attached ``Stabilizing 
Braces''

AGENCY: Bureau of Alcohol, Tobacco, Firearms, and Explosives, 
Department of Justice.

ACTION: Final rule.

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SUMMARY: The Department of Justice (``Department'' or ``DOJ'') is 
amending the regulations of the Bureau of Alcohol, Tobacco, Firearms, 
and Explosives (``ATF'') to clarify when a rifle is designed, made, and 
intended to be fired from the shoulder. Specifically, under the Gun 
Control Act of 1968 (``GCA'') and the National Firearms Act of 1934 
(``NFA'') the definition of ``rifle'' shall include a weapon that is 
equipped with an accessory, component, or other rearward attachment 
(e.g., a ``stabilizing brace'') that provides surface area that allows 
the weapon to be fired from the shoulder, provided other factors, as 
described in this preamble and in the amended regulations, indicate 
that the weapon is designed, made, and intended to be fired from the 
shoulder.

DATES: 
    Effective date: This rule is effective January 31, 2023.
    Compliance Date: Any weapons with ``stabilizing braces'' or similar 
attachments that constitute rifles under the NFA must be registered no 
later than May 31, 2023.

FOR FURTHER INFORMATION CONTACT: Denise Brown, Office of Regulatory 
Affairs, Enforcement Programs and Services, Bureau of Alcohol, Tobacco, 
Firearms, and Explosives, U.S. Department of Justice, 99 New York Ave. 
NE, Washington, DC 20226; telephone: (202) 648-7070 (this is not a 
toll-free number).

SUPPLEMENTARY INFORMATION: 

I. Executive Summary
    A. Summary of Regulatory Action
    B. Summary of Costs and Benefits
II. Background
    A. Authority Under GCA and NFA
    B. ``Stabilizing Brace'' Device-Related Classifications
III. Notice of Proposed Rulemaking
    A. Definition of ``Rifle''
    B. Application of Proposed ATF Worksheet 4999
IV. Analysis of Comments and Department Responses
    A. Comments Received in Support
    B. Comments Received in Opposition
V. Final Rule
    A. Definition of ``Rifle''
    B. Options for Affected Persons
    C. Discussion of Tax Forbearance
VI. Statutory and Executive Order
    A. Executive Orders 12866 and 13563
    B. Executive Order 13132
    C. Executive Order 12988
    D. Regulatory Flexibility Act
    E. Small Business Regulatory Enforcement Fairness Act of 1996
    F. Congressional Review Act
    G. Unfunded Mandates Reform Act
    H. Paperwork Reduction Act of 1995

I. Executive Summary

A. Summary of Regulatory Action

    This executive summary provides an overview of the relevant 
statutory definitions, a brief overview regarding the regulatory 
background prompting the issuance of a rule, a description of the 
earlier published notice of proposed rulemaking (``NPRM''), a 
description of this final rule after consideration of the comments 
received on the NPRM, and an overview of options for persons affected 
by this rule. Nothing in this rule bans ``stabilizing braces'' or the 
use of ``stabilizing braces'' on pistols; however, firearms \1\ with an 
attached ``brace'' device may be subject to statutory and regulatory 
requirements depending on the firearm's objective design features and 
other factors, as discussed in this rule. Furthermore, this rule does 
not impose any new legal obligations on owners of ``stabilizing 
braces'' at all, as any obligations for these owners result only from 
the NFA and the GCA. Instead, this rule merely conveys more clearly to 
the public the objective design features and other factors that 
indicate a weapon is in fact a firearm or short-barreled rifle under 
the relevant statutes.
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    \1\ Unless otherwise indicated, the term ``firearm,'' as used in 
this rule, means ``any weapon (including a starter gun) which will 
or is designed to or may readily be converted to expel a projectile 
by the action of an explosive.'' See 18 U.S.C. 921(a)(3)(A).
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    The GCA definition of ``firearm'' is broad and includes ``any 
weapon (including a starter gun) which will or is designed to, or that 
may be readily converted to, expel a projectile by the action of an 
explosive.'' 18 U.S.C. 921(a)(3)(A). This definition does not include 
an antique firearm. The GCA additionally provides definitions for the 
terms ``rifle'' and ``short-barreled rifle.'' 18 U.S.C. 921(a)(7), 
(a)(8). A ``rifle'' is defined as ``a weapon designed or redesigned, 
made or remade, and intended to be fired from the shoulder and designed 
or redesigned and made or remade to use the energy of an explosive to 
fire only a single projectile through a rifled bore for each single 
pull of the trigger.'' 18 U.S.C. 921(a)(7). A ``short-barreled rifle'' 
is defined as ``a rifle having one or more barrels less than sixteen 
inches in length and any weapon made from a rifle (whether by 
alteration, modification, or otherwise) if such weapon, as modified, 
has an overall length of less than twenty-six inches.'' 18 U.S.C. 
921(a)(8). The GCA imposes specific controls on the interstate 
transport of ``short-barreled rifle[s]'' and requires Federal firearms 
licensees (``FFLs'') to receive approval from the Attorney General 
prior to the sale of a ``short-barreled rifle.'' 18 U.S.C. 922(a)(4), 
(b)(4).\2\
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    \2\ The GCA, 18 U.S.C. 922(a)(4), makes it unlawful for any 
person, other than a licensed importer, licensed manufacturer, 
licensed dealer, or licensed collector, to transport in interstate 
or foreign commerce any ``short-barreled rifle'' except as 
authorized by the Attorney General consistent with public safety and 
necessity. Section 922(b)(4) makes it unlawful for any FFL to sell 
or deliver a ``short-barreled rifle'' to any person except as 
authorized by the Attorney General consistent with public safety and 
necessity.
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    The GCA also defines the term ``handgun'' as ``(A) a firearm which 
has a short stock and is designed to be held and fired by the use of a 
single hand; and (B) any combination of parts from which a firearm 
described in subparagraph (A) can be assembled.'' 18 U.S.C. 921(a)(30). 
A pistol, which is a type of handgun, is defined under 27 CFR 478.11 
and 479.11 as a weapon originally designed, made, and intended to fire 
a projectile from one or more barrels when held in one hand that has 
both a chamber as an integral part of, or permanently aligned with, the 
bore and a short stock designed to be gripped by one hand at an angle 
to and extending below the line of the bore.
    The NFA defines the term ``firearm'' differently and more narrowly 
than does the GCA. Under the NFA, the term ``firearm'' includes ``a 
rifle having a barrel or barrels of less than 16 inches in length'' and 
``a weapon made from a rifle if such weapon as modified has an overall 
length of less than 26 inches or a barrel or barrels of less than 16 
inches in length'' (also known as ``short-barreled rifle[s]'' as that 
term is defined under the GCA). 26 U.S.C. 5845(a)(3)-(4); 18 U.S.C. 
921(a)(8). The NFA defines the term ``rifle'' as ``a weapon designed or 
redesigned, made or remade, and intended to be fired from the shoulder 
and designed or redesigned and made or remade to use the energy of the 
explosive in a fixed cartridge to fire only a single projectile through 
a rifled bore for each single pull of the trigger, and shall include 
any such weapon which may be readily restored to fire a fixed 
cartridge.'' 26 U.S.C.

[[Page 6479]]

5845(c). The section of the NFA's definition of ``firearm'' that 
includes a ``rifle with a barrel or barrels less than 16 inches in 
length'' and a ``weapon made from a rifle'' is nearly identical to the 
GCA's definition of ``short-barreled rifle.''
    Firearms falling under the purview of the NFA must be registered in 
the National Firearms Registration and Transfer Record (``NFRTR'') to a 
person \3\ entitled to possess the firearm, 26 U.S.C. 5841; require 
approval by the Attorney General before their transfer or making, 26 
U.S.C. 5812, 5822; and are subject to transfer and making taxes, 26 
U.S.C. 5811, 5821. Additionally, any person engaged in the business of 
importing, manufacturing, or dealing NFA firearms must register with 
the Attorney General and pay a special (occupational) tax (``SOT''). 26 
U.S.C. 5801, 5802. Generally, all ``rifles,'' ``weapon[s] made from a 
rifle,'' and ``rifle[s] having a barrel or barrels of less than 16 
inches in length'' for purposes of the NFA are also ``firearms'' under 
the GCA.
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    \3\ The NFA does not define the term ``person;'' however, the 
Internal Revenue Code provides that, ``[w]hen used in this title, 
where not otherwise distinctly expressed or manifestly incompatible 
with the intent thereof . . . [t]he term `person' shall be construed 
to mean and include an individual, a trust, estate, partnership, 
association, company or corporation.'' 26 U.S.C. 7701(a)(1). NFA 
regulations similarly define the term ``person'' at 27 CFR 479.11.
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    In 2012, an FFL submitted the first ``stabilizing brace'' (or 
``brace'' device) to ATF asking if the addition of their prototype 
``brace'' device to a heavy pistol,\4\ such as an AR-15 type pistol, 
would change that pistol's classification under Federal firearms 
laws.\5\ The submitter described that the ``brace'' device was designed 
with the intent to assist people with disabilities so that they could 
fire these kinds of heavy pistols safely and comfortably, as they could 
be ``difficult to control with the one-handed precision stance.'' \6\ 
In response to this inquiry, ATF examined the submitted ``stabilizing 
brace'' device and found the sample ``provide[d] the shooter with 
additional support of a firearm while it is still held and operated 
with one hand'' and that the device was not ``designed or intended to 
fire a weapon from the shoulder.'' Accordingly, ATF concluded that the 
submitted ``brace,'' when attached to a firearm, did ``not convert that 
weapon to be fired from the shoulder and would not alter the 
classification of a pistol or other firearm,'' and therefore, ``such a 
firearm would not be subject to NFA controls.'' \7\
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    \4\ For purposes of the rule, ATF generally refers to the type 
of firearms that are typically equipped with a ``stabilizing brace'' 
as heavy pistols based on the manufacturer's stated intent. The use 
of the term ``pistol'' in this rule should not be interpreted as an 
official classification from ATF that any of these firearms are 
``pistols'' under Federal law. The Department recognizes that, under 
the final rule titled ``Definition of `Frame or Receiver' and 
Identification of Firearms,'' 87 FR 24652 (Apr. 26, 2022), these 
firearms incorporate a rifle receiver (e.g., AR-15 receiver).
    \5\ Letter for John Spencer, Chief, Firearms Technology Branch, 
ATF, from Alex Bosco, NST Global (Nov. 8, 2012).
    \6\ Id.
    \7\ Letter from ATF #2013-0172 (Nov. 26, 2012) (emphasis 
omitted).
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    Since then, the variety of available ``stabilizing braces'' or 
similar ``brace'' devices and pistols equipped with ``braces'' has 
grown significantly. In 2014, ATF began to see ``braces'' being used to 
fire weapons from the shoulder and new ``brace'' designs that included 
characteristics common to shoulder stocks. ATF's previous 
classifications had analyzed whether ``brace'' devices could 
effectively be used on the forearm for single-handed firing (as the 
manufacturer claimed). Additionally, for a period of time, many of 
ATF's classifications did not consider: (1) whether the firearm 
equipped with a specific ``brace'' model was designed or redesigned to 
be fired from the shoulder based on the objective design features of 
the weapon, or (2) how the firearm equipped with the ``brace'' was 
being used in the general community. The diversity of ``brace'' devices 
yielded a plethora of firearms with an attached ``stabilizing brace'' 
that possess objective design features indicative of firearms designed, 
made, and intended to be fired from the shoulder.\8\ As explained in 
this rule, because a majority of these firearms with an attached 
``stabilizing brace'' are configured as rifles and have a barrel or 
barrels of less than 16 inches in length, they fall under the purview 
of the NFA. Therefore, under the statute and regulations, individuals 
who attach a ``stabilizing brace'' to a firearm could find themselves 
making an NFA firearm without abiding by the registration and taxation 
requirements of the NFA.
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    \8\ Recoiltv, RECOILtv SHOT Show 2020: Angstadt Arms MDP9, 
RECOIL Gun Magazine (Jan. 22, 2020), <a href="https://www.recoilweb.com/recoiltv-shot-show-2020-angstadt-arms-mdp9-156974.html">https://www.recoilweb.com/recoiltv-shot-show-2020-angstadt-arms-mdp9-156974.html</a>; Gun Talk 
Media, Brace or No Brace: Springfield's SAINT AR Pistol [bond] Gun 
Talk, YouTube (June 16, 2018), <a href="https://www.youtube.com/watch?v=vPAmDoC0vUE">https://www.youtube.com/watch?v=vPAmDoC0vUE</a>; TFB TV, Ruger AR-556 Pistol: The New Budget 
Baseline, YouTube (Oct. 18, 2019), <a href="https://www.youtube.com/watch?v=oFqd7JONpDU&t=2s">https://www.youtube.com/watch?v=oFqd7JONpDU&t=2s</a>; PersonalDefenseNet, Shouldering an AR 
Pistol with a SIG Brace, YouTube (June 21, 2017), <a href="https://www.youtube.com/watch?v=DvoZxDLa-SM">https://www.youtube.com/watch?v=DvoZxDLa-SM</a>; Military Arms Channel, The NFA 
Nut Kicker!, YouTube (Apr. 19, 2017), <a href="https://www.youtube.com/watch?v=eol8fvMfENc">https://www.youtube.com/watch?v=eol8fvMfENc</a>.
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    Furthermore, ATF has made clear to makers and manufacturers that 
despite their purported intent with respect to the use or design of an 
accessory, the requirements of the NFA cannot be circumvented by 
attempting to configure a firearm with a purported ``stabilizing 
brace'' when the affixed device and configuration of the firearm 
includes features inherent in shoulder-fired weapons.\9\ For these 
reasons, it is necessary for the Department to amend the regulatory 
definition of ``rifle'' to make clear to the public the objective 
design features and other factors that must be considered when 
determining whether a firearm equipped with an accessory, component, or 
other rearward attachment (e.g., a ``stabilizing brace'') is a rifle 
designed, made, and intended to be fired from the shoulder. Although 
ATF will consider a manufacturer's stated intent as reflected in direct 
and indirect marketing materials or other information demonstrating the 
likely use of the weapon in the general community in assessing whether 
the firearm is or is not designed, made, and intended to be fired from 
the shoulder, the objective design features of the weapon may support 
or undermine that intent, and the stated intent will not necessarily be 
dispositive.
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    \9\ See generally ATF Open Letter on the Redesign of 
``Stabilizing Braces,'' from Max Kingery, Acting Chief, Firearms 
Technology Criminal Branch, Firearms and Ammunition Technology 
Division, ATF (Jan. 16, 2015) (``2015 Open Letter''); Letter for 
Mark Barnes, Outside Counsel to SB Tactical, LLC from Marvin G. 
Richardson, Assistant Director, Enforcement Programs and Services, 
ATF, 90000:GM, 5000, Re: Reversal of ATF Open Letter on the Redesign 
of ``Stabilizing Braces'' (Mar. 21, 2017); Letter from ATF #309513 
(Apr. 11, 2019); Letter from ATF #309921 (May 16, 2019); Letter from 
ATF #310678 (June 25, 2019).
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    On June 10, 2021, the Department published an NPRM in the Federal 
Register titled, ``Factoring Criteria for Firearms With Attached 
`Stabilizing Braces','' 86 FR 30826. The NPRM proposed amending ATF's 
definitions of ``rifle'' in 27 CFR parts 478 and 479 to expressly state 
that the term may include firearms equipped with a ``stabilizing 
brace,'' even though such firearms were already implicitly included in 
the definition by virtue of the fact that they were designed, made, and 
intended to be fired from the shoulder. The proposed amendment 
clarified that a firearm equipped with a ``stabilizing brace'' device 
falls under the definition of ``rifle'' if the weapon ``has objective 
design features and characteristics that facilitate shoulder fire,'' as 
indicated on ATF Worksheet 4999, Factoring Criteria for Rifled Barrel 
Weapons with Accessories commonly referred to as ``Stabilizing Braces''

[[Page 6480]]

(``Worksheet 4999''). Id. at 30851. The Department published for public 
comment the criteria ATF considers when evaluating the objective design 
features of firearms equipped with a ``stabilizing brace'' to determine 
whether the weapon is a ``rifle'' or ``short-barreled rifle'' under the 
GCA and a ``rifle'' or ``firearm,'' (i.e., a short-barreled rifle) 
under the NFA. The NPRM also included the proposed Worksheet 4999, 
which assigned points to various criteria and provided examples of how 
the Worksheet 4999 would be used to evaluate firearms equipped with 
certain models of ``stabilizing braces.''
    After careful consideration of the comments received regarding the 
complexity in understanding the proposed Worksheet 4999 and the 
methodology used in the Worksheet to evaluate firearms equipped with a 
``brace'' device, this final rule does not adopt some aspects of the 
approach proposed in the NPRM, specifically the Worksheet 4999 and its 
point system. Instead, based on the comments received, the Department 
took the relevant criteria discussed in the NPRM and Worksheet 4999 
that indicate when a firearm is designed, made, and intended to be 
fired from the shoulder and incorporated them into the rule's revised 
definitions of rifle. Because both the GCA and NFA define a ``rifle'' 
as a weapon ``designed or redesigned, made or remade, and intended to 
be fired from the shoulder,'' the Department believes that a weapon 
that is equipped with an accessory, component, or other rearward 
attachment (e.g., a ``stabilizing brace'') that provides surface area 
that allows the weapon to be fired from the shoulder is a rifle, 
provided the other factors described in this preamble and listed in the 
final regulatory text indicate the weapon is designed, made, and 
intended to be fired from the shoulder.
    Accordingly, the Department amends the definition of ``rifle'' 
under 27 CFR 478.11 and 479.11 to expressly state that the term 
``designed or redesigned, made or remade, and intended to be fired from 
the shoulder'' includes a weapon that is equipped with an accessory, 
component, or other rearward attachment (e.g., a ``stabilizing brace'') 
that provides surface area that allows the weapon to be fired from the 
shoulder, provided other factors, as listed in the amended regulations 
and described in this preamble, indicate that the weapon is designed, 
made, and intended to be fired from the shoulder. The other factors 
are:
    (1) Whether the weapon has a weight or length consistent with the 
weight or length of similarly designed rifles;
    (2) Whether the weapon has a length of pull, measured from the 
center of the trigger to the center of the shoulder stock or other 
rearward accessory, component or attachment (including an adjustable or 
telescoping attachment with the ability to lock into various positions 
along a buffer tube, receiver extension, or other attachment method), 
that is consistent with similarly designed rifles;
    (3) Whether the weapon is equipped with sights or a scope with eye 
relief that require the weapon to be fired from the shoulder in order 
to be used as designed;
    (4) Whether the surface area that allows the weapon to be fired 
from the shoulder is created by a buffer tube, receiver extension, or 
any other accessory, component, or other rearward attachment that is 
necessary for the cycle of operations;
    (5) The manufacturer's direct and indirect marketing and 
promotional materials indicating the intended use of the weapon; and
    (6) Information demonstrating the likely use of the weapon in the 
general community.
    All of the objective design features and factors listed in the rule 
that indicate the weapon is designed, made, and intended to be fired 
from the shoulder are derived from the NPRM and proposed Worksheet 
4999.
    The revised definition in this final rule clarifies, consistent 
with the best interpretation of the statutory provision, that firearms 
with an attached ``stabilizing brace'' can possess objective design 
features that make them ``rifles,'' as that term is defined under the 
NFA and GCA. If a firearm with an attached ``stabilizing brace'' meets 
the definition of a ``rifle'' based on the factors indicated in this 
final rule, then that firearm could also be a short-barreled rifle 
depending on the length of the attached barrel, thus subjecting it to 
additional requirements under the NFA and GCA. However, a firearm with 
an attached ``brace'' device is not a ``rifle'' as defined in the 
relevant statutes if the weapon is not designed, made, and intended to 
be fired from the shoulder. The rule, as proposed and finalized, does 
not ban ``stabilizing braces'' or prohibit firearms with an attached 
``stabilizing brace,'' regardless of the firearm's classification.
    This revised definition reflects the Department's understanding of 
the best interpretation of the statute, and it is immediately 
effective. See 5 U.S.C. 553(d)(2). In addition, because prior ATF 
classifications of firearms equipped with a ``brace'' device did not 
all employ this correct understanding of the statutory terms, all such 
prior classifications are no longer valid as of January 31, 2023. While 
firearms equipped with ``stabilizing braces'' or other rearward 
attachments may be submitted to ATF for a new classification 
determination, a majority of the existing firearms equipped with a 
``stabilizing brace'' are likely to be classified as ``rifles'' because 
they are configured for shoulder fire based on the factors described in 
this rule. Because many of these firearms generally have a barrel of 
less than 16 inches, they are likely to be classified as short-barreled 
rifles subject to regulation and registration under the NFA and GCA.
    Consequently, many parties in possession of weapon and ``brace'' 
combinations that ATF did not specifically classify in the past as 
being subject to the NFA may have been violating the NFA by possessing 
an unregistered rifle with a barrel of less than 16 inches. In 
addition, where the Department is overruling ATF's previous 
classification letters, possessors of the firearms equipped with 
``stabilizing braces'' that were at issue in those letters may also be 
in possession of unregistered NFA firearms. Prior to the publication of 
the NPRM and this rule to clarify the regulatory definition of a rifle, 
many parties did not register these firearms due to a variety of 
factors discussed in this rule. Therefore, in exercising its 
enforcement discretion, the Department provides affected persons 
options that they can choose from by May 31, 2023 to comply with the 
statutory requirements. For example, possessors of such weapons, 
whether an unlicensed individual or an FFL (regardless of SOT status), 
may register the firearms to comply with the statutory requirements. As 
discussed in section V.B of this preamble, ATF strongly encourages 
affected parties to use the eForms system (<a href="https://eforms.atf.gov">https://eforms.atf.gov</a>) to 
submit an electronic version of the appropriate NFA forms. Any 
penalties for failure to take the necessary action for these existing 
firearms to comply with Federal law would result only from conduct 
occurring after this time period to take action ends.
    Provided the registration form is properly submitted and documented 
within the defined time period, the Department will consider 
individuals to be in compliance with the statutory requirements between 
the date on which a person's application is filed

[[Page 6481]]

and the date a person receives ATF approval or disapproval of the 
application. After the 120-day registration period following 
publication of this rule, registration of previously made or 
manufactured weapons with a ``stabilizing brace'' that constitute NFA 
firearms will not be permitted. The Department at that time may take 
enforcement action against any person in possession of an affected 
firearm that is a short-barreled rifle for which a registration has not 
been submitted.
    Apart from registration, there are other options that are set out 
in section V.B. of this preamble that include modifying affected 
weapons to remove them from the definition of a short-barreled rifle, 
destroying the firearm, or surrendering the firearm to law enforcement. 
Registering the firearm or modifying the configuration of such a 
firearm within the defined time period will enable affected persons to 
lawfully retain possession of their firearm under Federal law. While 
possessors of such weapons will themselves be able to apply the factors 
outlined in the amended regulatory text, ATF is publishing information 
simultaneously with this rule that will inform the public of both (1) 
common weapon platforms with attached ``stabilizing brace'' designs and 
(2) examples of commercially available firearms equipped with a 
``stabilizing brace'' that are short-barreled rifles. Additionally, an 
individual may contact ATF to receive a determination of whether their 
firearm equipped with a ``stabilizing brace'' is a rifle as defined by 
the GCA and NFA.
    The Department has determined that, as a matter of its own 
enforcement discretion, it will not, as the NPRM suggested as an 
option, require individuals and FFLs without an SOT that timely 
register their affected weapons with a ``stabilizing brace,'' which are 
in their possession as of the date this rule is published, to pay the 
$200 making tax usually due upon submission of such an application to 
register. Likewise, Type 7 FFLs (regardless of SOT status) that timely 
register the weapons with a ``stabilizing brace'' that qualify as an 
NFA firearm and that are still in their inventory--i.e., that have not 
been sold or otherwise transferred--will not owe any making tax for 
these weapons. Furthermore, the Department has determined that, as a 
matter of its own enforcement discretion, it will not seek to collect 
retroactive taxes (i.e., $200 making or $200 transfer tax) typically 
required for each weapon with a ``stabilizing brace'' that qualifies as 
an NFA firearm that was manufactured or transferred at any time prior 
to the date of the publication of this final rule. See section V.C.
    Notwithstanding the 120-day compliance period, discussed above, the 
rule is immediately effective in that the Department may seek to 
enforce the NFA's requirements with respect to any new making or new 
transfer of a weapon with an attached ``stabilizing brace'' that 
constitutes a short-barreled rifle under the NFA. The Department 
believes that delaying enforcement of the relevant NFA provisions is 
not necessary to allow an equitable opportunity for compliance because 
all persons, through publication of this rule, have received notice 
that the NFA may in fact apply to their conduct. Further delaying 
enforcement also would be inconsistent with public safety. Therefore, 
ATF may enforce the NFA against any person or entity that--any time 
after the publication date of this rule--newly makes or transfers a 
weapon with an attached ``stabilizing brace'' that constitutes a short-
barreled rifle under the NFA. For purposes of the Congressional Review 
Act, however, the Department will wait to actually initiate such 
enforcement actions for at least 60 days from publication of the rule 
in the Federal Register. See 5 U.S.C. 801(a)(3).

B. Summary of Costs and Benefits

    In sum, ATF anticipates the cost of the rule is $266.9 million, 
annualized and discounted at seven percent. The total costs calculated 
for this rule take into account the various options, described above, 
that affected parties can choose from to come into compliance with the 
statutory requirements. The benefit of this rule is preventing 
manufacturers and individuals from violating the requirements of the 
NFA and GCA. Congress placed stricter requirements on the making and 
possession of short-barreled rifles, deeming them to be dangerous and 
unusual weapons and posing a significant danger to the public, as 
discussed below. This rule enhances public safety by reducing the 
further proliferation and criminal use of firearms with attached 
``stabilizing braces.'' Refer to the standalone Final Regulatory Impact 
Analysis, available on <a href="http://www.atf.gov">www.atf.gov</a>, for a full discussion of the 
potential costs and benefits of the rule.

II. Background

A. Authority Under the GCA and NFA

    The Attorney General is responsible for enforcing the GCA, as 
amended, and the NFA, as amended,\10\ and Congress has included 
provisions in these statutes that authorize the Attorney General to 
promulgate regulations as are necessary to enforce the provisions of 
the GCA and NFA. See 18 U.S.C. 926(a); 26 U.S.C. 7801(a)(2)(A), 
7805(a).\11\ Congress and the Attorney General have delegated the 
responsibility for administering and enforcing the GCA and NFA to the 
Director of ATF, subject to the direction of the Attorney General and 
the Deputy Attorney General. See 26 U.S.C. 7801(a)(2); 28 U.S.C. 
599A(b)(1), (c)(1); 28 CFR 0.130(a)(1)-(2); T.D. Order No. 221(2)(a), 
(d), Establishment, Organization, and Functions, 37 FR 11696-97 (June 
10, 1972). Accordingly, the Department and ATF have promulgated 
regulations to implement the GCA and NFA. See 27 CFR parts 478, 479.
---------------------------------------------------------------------------

    \10\ NFA provisions still refer to the ``Secretary of the 
Treasury.'' See generally 26 U.S.C. ch. 53. However, the Homeland 
Security Act of 2002, Public Law 107-296, 116 Stat. 2135, 
transferred the functions of ATF from the Department of the Treasury 
to the Department of Justice, under the general authority of the 
Attorney General. 26 U.S.C. 7801(a)(2); 28 U.S.C. 599A(c)(1). Thus, 
for ease of reference, this rule refers to the Attorney General 
throughout.
    \11\ See also section IV.B.1.a, infra.
---------------------------------------------------------------------------

    The ATF Director delegated the authority to classify firearms 
pursuant to the GCA and NFA to ATF's Firearms Technology Criminal 
Branch (``FTCB'') and the Firearms Technology Industry Services Branch 
(``FTISB''). Both FTCB and FTISB fall under the Firearms and Ammunition 
Technology Division (``FATD''), Office of Enforcement Programs and 
Services.\12\ FATD supports the firearms industry and the general 
public by, among other things, responding to technical inquiries and 
testing and evaluating firearms voluntarily submitted to ATF for a 
determination of a firearm's classification under the GCA or NFA. There 
is no requirement that members of the firearms industry or the public 
submit firearms to ATF for evaluation of the firearm's classification 
under Federal law.\13\
---------------------------------------------------------------------------

    \12\ DOJ, Delegation of Authorities Within the Bureau of 
Alcohol, Tobacco, Firearms and Explosives, Delegation Order 
1100.168C (Nov. 5, 2018).
    \13\ The only exception is in cases of a conditional import 
under an exception to the general importation restrictions under the 
GCA and NFA. See 18 U.S.C. 922(l); 26 U.S.C. 5844; 27 CFR 478.116; 
479.113.
    \14\ 18 U.S.C. 921(a)(3) (GCA definition of firearm); 26 U.S.C. 
5845(a) (NFA definition of firearm).
---------------------------------------------------------------------------

    The statutory definitions of ``firearm'' under the GCA and the NFA 
are different.\14\ The definition of ``firearm'' under the GCA is broad 
and encompasses almost all weapons defined as a ``firearm'' under the 
NFA

[[Page 6482]]

because they may expel a projectile by the action of an explosive. 
However, when Congress passed the NFA in 1934, it chose to regulate 
certain ``gangster-type weapons'' more stringently than other firearms 
because they were viewed as especially dangerous and unusual.\15\ 
Congress chose to define such weapons as ``firearms''; hence, the NFA's 
definition of ``firearm'' is narrower than the GCA's definition of 
``firearm'' in that it captures only particular types of weapons, for 
example, machineguns, short-barreled rifles, and short-barreled 
shotguns.
---------------------------------------------------------------------------

    \15\ Congress chose to regulate these firearms by taxing them. 
Therefore, the NFA is part of the Internal Revenue Code. Courts have 
recognized that NFA firearms are dangerous and unusual, and that 
possession of unregistered firearms poses a danger to the community. 
For a description of the relevant case law, see infra section 
IV.A.2.
---------------------------------------------------------------------------

    A ``firearm'' under the NFA is subject not only to general GCA 
requirements but is further subject to making and transfer taxes and 
must be registered with ATF in the NFRTR. See 26 U.S.C. 5811-5812, 
5821-5822, 5841, 5845. In addition to the NFA requirements, the GCA 
also imposes specific restrictions on the transportation, sale, and 
delivery of ``short-barreled rifle[s]'' and ``short-barreled 
shotgun[s].'' 18 U.S.C. 922(a)(4), (b)(4). These violations under the 
GCA are punishable by up to five years in prison and a fine of up to 
$250,000. See 18 U.S.C. 924(a)(1), 3571. Violations of the NFA are 
punishable by up to 10 years in prison and a fine of up to $10,000. 26 
U.S.C. 5871.
    Although it is not mandatory, many FFLs voluntarily submit 
classification requests to ATF because FATD's classification of a 
particular firearm allows industry members to plan, develop, and 
distribute products in compliance with the law. This can reduce their 
risk of incurring criminal or civil penalties, or the potential for 
costly corrective actions, including a possible recall by the 
manufacturer. Classifications provide the submitter a written 
determination by ATF of how the laws and regulations apply to their 
specific firearm.
    When FATD evaluates a submitted firearm sample, it examines the 
overall configuration, physical characteristics, other objective design 
features that are relevant under the statutory definitions of the NFA 
and GCA, and any other information that directly affects the 
classification of a particular firearm configuration as presented with 
that sample.\16\ The numerous configurations, materials, and designs of 
modern firearms require thorough examination and consideration to 
ensure an accurate classification. Even though firearms may have a 
similar appearance (e.g., shape, size, etc.), an ATF classification of 
a voluntarily submitted sample pertains only to the particular sample 
as originally configured when submitted because of the vast number of 
variations that are possible in respective submissions. See 27 CFR 
478.92(c), 479.102(c). Any change in design, materials, or other 
features may affect a firearm's classification or have different 
implications under the GCA or NFA. In addition, a manufacturer's or 
maker's stated intent regarding a particular submission, while 
considered by ATF in its evaluation of a weapon, is not dispositive if 
the objective design features do not support that stated intent.\17\
---------------------------------------------------------------------------

    \16\ For instance, ATF regulations explain with respect to 
classifications of frames or receivers that ``the Director may 
consider any associated templates, jigs, molds, equipment, tools, 
instructions, guides, or marketing materials that are sold, 
distributed, or possessed with the item or kit, or otherwise made 
available by the seller or distributor of the item or kit to the 
purchaser or recipient of the item or kit.'' 27 CFR 478.12(c).
    \17\ See Sig Sauer, Inc. v. Brandon, 826 F.3d 598, 601 (1st Cir. 
2016) (noting that, in the firearms classification context, it is 
appropriate for ATF to consider ``a part's design features . . . as 
part of the inquiry into'' the intended use of that part). The court 
noted that ``[s]uch an objective approach to ferreting out a party's 
intent is a very familiar one in the law. See, e.g., United States 
v. Siciliano, 578 F.3d 61, 77 (1st Cir. 2009) (noting that objective 
evidence is useful to `buttress or rebut direct testimony as to 
intent'); cf. Washington v. Davis, 426 U.S. 229, 253, 96 S. Ct. 
2040, 48 L. Ed. 2d 597 (1976) (Stevens, J., concurring) (`Frequently 
the most probative evidence of intent will be objective evidence of 
what actually happened rather than evidence describing the 
subjective state of mind of the actor.'); United States v. Gaw, 817 
F.3d 1 (1st Cir. 2016) (`[T]he law is long since settled that the 
prosecution may prove its case without direct evidence of a 
defendant's guilty knowledge so long as the array of circumstantial 
evidence possesses sufficient persuasive power.' (quoting United 
States v. O'Brien, 14 F.3d 703, 706 (1st Cir. 1994))).'' Id. at 601-
02.
---------------------------------------------------------------------------

B. ``Stabilizing Brace'' Device-Related Classifications

    Since 2012, ATF has analyzed how numerous ``brace'' devices affect 
a weapon's classification under the NFA and has also classified 
numerous firearms equipped with a ``stabilizing brace'' for industry, 
the public, and in criminal cases. Results of the classifications were 
mixed, but ATF classified the majority of these submissions as NFA 
firearms. On November 8, 2012, an FFL submitted the first forearm 
``stabilizing brace'' to ATF asking if the addition of their prototype 
device to a heavy pistol, such as an AR-type pistol, would change that 
type of pistol's classification under Federal firearms laws.\18\ The 
submitter described the ``brace'' device as designed to assist people 
with disabilities or limited strength or mobility with firing heavy 
pistols safely and comfortably, as these weapons can be ``difficult to 
control with the one [-] handed precision stance.'' The requester 
included the prototype pictures below.
---------------------------------------------------------------------------

    \18\ Letter for John Spencer, Chief, Firearms Technology Branch, 
ATF, from Alex Bosco, NST Global (Nov. 8, 2012).
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BILLING CODE 4410-FY-P

[[Page 6483]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.015

    Based on the information provided, ATF's FATD (then the Firearms 
Technology Branch) inspected the ``brace'' device and found that the 
particular sample was not ``designed or intended to fire a weapon from 
the shoulder.'' \19\ FATD also concluded that, because the submitted 
``stabilizing brace,'' when attached to a firearm, did not convert that 
weapon to be fired from the shoulder, the attachment of the submitted 
``stabilizing brace'' would not alter the classification of a pistol or 
other firearm.\20\ This conclusion indicated that an AR-type pistol 
with the attached ``stabilizing brace'' would not be subject to the 
provisions of the NFA. Later, Sig Sauer marketed a firearm equipped 
with a variation of the original ``stabilizing brace'' device, the 
SB15, which is pictured below.\21\ The SB15 ``brace'' device is a 
product of the original brace manufacturer that was modified from the 
original ``stabilizing brace'' submitted to ATF for classification, 
discussed above.\22\
---------------------------------------------------------------------------

    \19\ Letter from ATF #2013-0172 (Nov. 26, 2012).
    \20\ The FATD classification used the term ``convert.'' This is 
consistent with the legal inquiry of whether a firearm is 
``redesigned'' to be fired from the shoulder. See 18 U.S.C. 
921(a)(7); 26 U.S.C. 5845(c).
    \21\ These firearms with an attached SB15 ``stabilizing brace 
were manufactured and sold by Sig Sauer. See Sig Sauer, Pistols 
(July 1, 2014), <a href="https://web.archive.org/web/20140701212719/http://sigsauer.com/CatalogProductDetails/pm400-11-fde-psb.aspx">https://web.archive.org/web/20140701212719/http://sigsauer.com/CatalogProductDetails/pm400-11-fde-psb.aspx</a>.
    \22\ SB Tactical, Pistol Stabilizing Brace (Sept. 28, 2014), 
<a href="https://web.archive.org/web/20140928204628/http://www.sb-tactical.com/">https://web.archive.org/web/20140928204628/http://www.sb-tactical.com/</a>.

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[[Page 6484]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.016

BILLING CODE 4410-FY-C
    After this initial classification, ATF received additional 
inquiries specifically on whether the use of a ``stabilizing brace'' as 
a shoulder stock redesigns the firearm to be a short-barreled rifle 
under the NFA and GCA. In March 2014, ATF responded to an inquiry from 
an unlicensed person who asked if firing an AR-type pistol from the 
shoulder would cause the pistol to be reclassified as a short-barreled 
rifle subject to NFA controls.\23\ In its response, FATD noted that it 
classifies firearms based on the ``physical design characteristics,'' 
and that, while functionality indicates the intended design, it is not 
the sole criterion for determining the classification of a weapon.\24\ 
FATD advised that it does not classify weapons based on how a 
particular individual uses a weapon and that merely firing an AR-type 
pistol from the shoulder did not reclassify it as a short-barreled 
rifle.\25\ FATD further mentioned that some ``brace'' designs, such as 
the Sig Stability Brace, had not been classified as a shoulder stock 
and that, therefore, using those ``braces'' improperly would not 
constitute a design change or change the classification of the 
weapon.\26\
---------------------------------------------------------------------------

    \23\ Letter from ATF #301737 (Mar. 5, 2014).
    \24\ Id.
    \25\ Id.
    \26\ This and other ATF classification letters before 2018 
referred to whether a ``brace'' had been classified as a shoulder 
stock. However, the proper inquiry as to whether a weapon is a 
``rifle'' under the NFA and the GCA is not whether a particular 
component or accessory of the weapon is a stock, but whether the 
firearm, as configured, is ``designed or redesigned, made or remade, 
and intended to be fired from the shoulder.'' 26 U.S.C. 5845(c). As 
this rule explains, ATF later corrected the standard it was applying 
by considering whether firearms configured with a ``stabilizing 
brace'' were intended to be fired from the shoulder. The focus on 
classifying an item as a ``stock'' was one of the issues that led to 
inconsistencies in ATF's classification of these firearms.
---------------------------------------------------------------------------

    Also in 2014, an individual asked ATF to examine the SB15 
``stabilizing brace'' on a firearm commonly known as a ``pistol grip 
firearm'' with a smooth bore to verify that the firearm is not 
regulated under the NFA. On October 28, 2014, ATF concluded: (1) that a 
forward grip (an additional handgrip toward the front of the firearm in 
addition to the pistol grip) attached to a pistol redesigns the firearm 
to be fired with two hands and therefore the firearm is no longer a 
``handgun'' or ``pistol,'' and (2) that it would be classified as ``any 
other weapon'' pursuant to 26 U.S.C. 5845(e) under the NFA if its 
overall length is less than 26 inches or if it is actually concealed on 
the person.\27\ The overall length of the submitted firearm was 27-1/4 
inches and therefore ATF determined that, as submitted, the firearm was 
subject to regulation under the GCA but was not an NFA firearm, 
``provided the SigTac SB15 pistol stabilizing brace is used as 
originally designed and NOT used as a shoulder stock.'' \28\ In 
essence, ATF's original analysis focused on whether the inclusion of 
the forward grip subjected the firearm to the NFA, but ATF did not 
consider how the classification would be affected if a ``pistol grip 
firearm'' without a forward grip were to incorporate a ``stabilizing 
brace.'' Nevertheless, the addition of a ``stabilizing brace'' to these 
types of firearms does not assist with one-handed firing but rather 
redesigns the firearm by providing surface area for firing from the 
shoulder. Therefore, these types of firearms would fall within the 
purview of the NFA as short-barreled shotguns. 26 U.S.C. 5845(d). 
Because these types of firearms were never designed to be fired from 
one hand, this rule, as described in the NPRM, does not apply to 
firearms commonly referred to as pistol grip shotguns.\29\ 86 FR at 
30828-29. The 2014 classification described above and any 
classification that provides that a pistol grip shotgun is not an NFA 
firearm is no longer valid or authoritative as of January 31, 2023, and 
the firearm should be resubmitted to FATD for evaluation.
---------------------------------------------------------------------------

    \27\ Letter from ATF #302492 (Oct. 28, 2014).
    \28\ Id. (underlining omitted, capitalization in the original).
    \29\ FATD experts state that a ``pistol grip shotgun'' typically 
refers to a weapon with the following attributes: (1) overall length 
of over 26 inches; (2) 12-gauge, smooth-bore barrel under 18 inches; 
(3) utilizes a shotgun-type receiver that has never had a shoulder 
stock attached; and (4) fitted with a ``bird's head'' grip in lieu 
of a shoulder stock.

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[[Page 6485]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.017

    After the SB15 classification, ATF received newly designed 
``stabilizing brace'' devices from other companies. One company in 2014 
submitted a ``Pistol Overmold Kit'' with a ``foam padded stabilizer 
tube'' intended to accommodate a Glock-type pistol and requested a 
classification of the firearm to determine if it would be regulated 
under the NFA. The company likened its product to installing a receiver 
extension/buffer tube on an AR type pistol, a configuration that FATD 
had earlier decided was not a shoulder stock when installed on that 
type of firearm and did not result in a change of that pistol's 
classification. However, FATD concluded that the ``foam padded 
stabilizer tube'' served ``no legitimate, functional purpose other than 
to extend additional contact surface rearward'' on Glock-type pistols 
and therefore would result in the manufacture of a ``short-barreled 
rifle.'' \30\
---------------------------------------------------------------------------

    \30\ Letter from ATF #302375 (Nov. 10, 2014).
    [GRAPHIC] [TIFF OMITTED] TR31JA23.018
    
    In addition, FATD examined a ``Pistol Overmold Kit'' with an 
``adjustable stabilizer'' also intended to incorporate a Glock-type 
pistol. FATD similarly concluded the ``brace'' device served no purpose 
but to extend the rearward surface of the firearm and that the 
``brace'' device is not required for the cycle of operations (i.e., to 
expel a projectile by the action of an explosive) of Glock-type 
pistols.\31\ FATD therefore concluded the installation of the 
``adjustable stabilizer'' would result in the manufacture of a short-
barreled rifle regulated under the NFA.\32\
---------------------------------------------------------------------------

    \31\ Letter from ATF #302531 (Nov. 13, 2014).
    \32\ Id.

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[[Page 6486]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.019

    ATF continued to receive new designs of ``stabilizing braces'' from 
additional manufacturers. In September 2014, an FFL submitted a ``Blade 
AR pistol stabilizer'' device that incorporated a flexible stabilizing 
``fin'' to rest against the inside of the shooter's forearm when in the 
firing position. According to the FFL, the ``Blade AR pistol 
stabilizer'' ``stabilizes the firearm in the horizontal plane,'' and 
``[t]he friction created between the user's forearm and the fin then 
stabilizes the firearm in the vertical plane.'' \33\ They further 
stated that ``a user . . . can wrap a standard sling around the Blade 
AR and their forearm and secure it with the thumb of their firing hand 
to further stabilize their firearm in both the horizontal and vertical 
planes,'' as shown below.\34\
---------------------------------------------------------------------------

    \33\ Letter from ATF #302672 (Dec. 15, 2014).
    \34\ Id.
    \35\ As used in this rule, the term ``accessory'' is intended as 
a general term to describe the marketing of items commonly known as 
``stabilizing braces.'' Furthermore, use of that term in this rule 
does not affect any determinations whether such items are ``defense 
articles'' under the Arms Export Control Act (``AECA''). Please 
direct all inquiries as to possible liability for the firearms and 
ammunition excise tax, 26 U.S.C. 4181-4182, to the Department of the 
Treasury, Alcohol and Tobacco Tax and Trade Bureau.
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BILLING CODE 4410-FY-P
[GRAPHIC] [TIFF OMITTED] TR31JA23.020


[[Page 6487]]


    Like other submitters, the FFL asked if the addition of this device 
would convert a firearm in a manner that would cause it to be 
classified as a ``rifle'' and thus a ``firearm'' regulated under the 
NFA. In response, ATF stated ``the submitted forearm brace, when 
attached to a pistol . . . is not a `firearm' as defined by the NFA 
provided the Blade AR Pistol Stabilizer is used as originally designed 
[i.e., for additional stabilizing support for single-handed firing] and 
NOT used as a shoulder stock.'' \36\
---------------------------------------------------------------------------

    \36\ Letter from ATF #302672 (Dec. 15, 2014) (emphasis omitted).
---------------------------------------------------------------------------

    Due to inconsistent advice regarding how the use of a ``stabilizing 
brace'' device affected a classification, and because FATD continued to 
receive questions regarding whether a ``brace'' device could be used 
from the shoulder, ATF issued a 2015 Open Letter to the public 
regarding the classifications of firearms equipped with these ``brace'' 
devices under the NFA.\37\ The 2015 Open Letter advised that 
``stabilizing braces'' designed to assist shooters with single-handed 
firing were not considered a shoulder stock and could be attached to a 
handgun without making an NFA firearm. The 2015 Open Letter also 
provided that a person who ``intends to use a handgun stabilizing brace 
as a shoulder stock on a pistol . . . having a rifled barrel under 16 
inches'' is making a firearm subject to the NFA. The 2015 Open Letter 
further stated that ``any person who redesigns a stabilizing brace for 
use as a shoulder stock makes a[n] NFA firearm when attached to a 
pistol with a rifled barrel under 16 inches in length or handgun with a 
smooth bore under 18 inches in length.'' \38\
---------------------------------------------------------------------------

    \37\ See 2015 Open Letter, supra note 9.
    \38\ Id. (emphasis in the original).
---------------------------------------------------------------------------

    In 2015, an attorney representing the original developer of the 
``stabilizing brace'' asked for a determination on whether the 
attachment of a retractable stabilizing brace to a handgun with a 
barrel under 16 inches constituted a firearm under the NFA. The 
requester provided the diagram below as part of the determination 
request.
[GRAPHIC] [TIFF OMITTED] TR31JA23.021

    On November 30, 2015, FATD responded by noting that prior devices 
``were not configurable to a position or setting in which the device 
more closely resembled a buttstock or shoulder stock in form and 
function.'' FATD noted that this modified version was not similar to 
those prior other devices in which ATF found that the device did not 
convert the handgun to an NFA weapon.\39\ FATD stated that ``modifying 
the length of that part [of a `stabilizing brace'] serves to extend a 
contact surface rearward of the pistol grip,'' which is ``a feature 
commonly associated with butt stocks/shoulder stocks'' and shoulder-
fired weapons. FATD advised that the ``Retractable Pistol Stabilizing 
Brace'' would likely be classified as a ``device similar in form and 
function to a buttstock when installed on a firearm[,] thus 
reconfiguring the firearm'' into a short-barreled rifle under the NFA. 
FATD further advised that the requester would need to submit a physical 
sample in order for ATF to issue a formal classification.\40\
---------------------------------------------------------------------------

    \39\ Letter from ATF #303984 (Nov. 30, 2015).
    \40\ Id.
---------------------------------------------------------------------------

    In 2015, the submitter of the original ``stabilizing brace'' device 
requested an evaluation of the physical device installed on a SIG MPX 
firearm that could be adjusted forward to accommodate smaller shooters 
for a more comfortable fit on the shooter's forearm.

[[Page 6488]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.022

    In its evaluation, FATD noted that the raised ridges on the rear of 
the submitted sample ``serve no functional purpose in the design of a 
pistol brace; however, the ridges [on the back] do provide a non-slip, 
gripping surface, a feature commonly associated with buttstocks/
shoulder stocks as well as firearms designed and intended to be fired 
from the shoulder.'' \41\
---------------------------------------------------------------------------

    \41\ Letter from ATF #304296 (Dec. 22, 2015).
    [GRAPHIC] [TIFF OMITTED] TR31JA23.023
    
    FATD determined that this would not be a ``short-barreled rifle,'' 
provided the ``brace'' device is used as originally designed, not used 
as a shoulder stock, and the raised ridges are removed from the rear of 
the device. FATD's classification relied on the manufacturer's 
continued representation that the design of the ``brace'' was to assist 
disabled shooters when firing heavy pistols with one-hand--indeed, the 
stated intent was ``[c]entral'' to ATF's conclusion.\42\
---------------------------------------------------------------------------

    \42\ Id.
---------------------------------------------------------------------------

    On January 21, 2016, FATD classified a Smith and Wesson M&P pistol 
equipped with a ``universal pistol brace,'' which was marketed so that 
shooters can use the ``brace'' either above or below the forearm for 
support and recoil mitigation.\43\
---------------------------------------------------------------------------

    \43\ Letter from ATF #303907 (Jan. 21, 2016).
    [GRAPHIC] [TIFF OMITTED] TR31JA23.024
    

[[Page 6489]]


    FATD found the ``universal pistol brace'' device useful to reduce 
recoil of the host weapon (a Smith and Wesson M&P pistol) when the 
shooter places the foam piece of the brace on top of the shooter's 
forearm.\44\ However, FATD determined that the device, when assembled 
in an alternate configuration, incorporated buttstock design features, 
and that a firearm with the ``brace'' device installed in the alternate 
configuration depicted above had a length of pull of 14-\1/16\ inches. 
This letter defined length of pull as the ``measurement found on 
shoulder[-]fired weapons, generally measured from the center of the 
trigger to the center of the buttplate/buttstock.'' \45\ FATD reasoned 
that the length of pull of shoulder-fired weapons is approximately 13-
\1/2\ to 14-\1/2\ inches. After finding that this configuration 
resulted in an overall length of approximately 18-\1/2\ inches and a 
barrel length of approximately 4-\1/4\ inches, FATD classified this 
firearm as a short-barreled rifle under the NFA.
---------------------------------------------------------------------------

    \44\ Id.
    \45\ Id.
---------------------------------------------------------------------------

    The manufacturer subsequently redesigned the ``universal pistol 
brace'' device and resubmitted it to ATF. The second submission of the 
device in the alternate configuration now incorporated a length of pull 
of 12-\1/8\ inches, as depicted below. This evaluation also found that 
the foam portion of the ``forearm brace'' did not provide a surface 
area found on a shoulder stock assembly when attached to a pistol. FATD 
concluded that the device, when attached to a pistol-type firearm, did 
not design or redesign the host weapon to be fired from the 
shoulder.\46\
---------------------------------------------------------------------------

    \46\ Letter from ATF #304484 (June 7, 2016).
    [GRAPHIC] [TIFF OMITTED] TR31JA23.025
    
    In 2016, another ``brace'' design reviewed by FATD was one that 
incorporated a folding clamp intended to provide support to the firing 
hand and designed to be attached to an AR-type buffer tube or similar 
receiver extension. This type of device is referred to as a 
counterbalance type ``stabilizing brace'' as discussed in section 
IV.B.3.b.viii of this preamble.

[[Page 6490]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.026

    FATD found that this device, when assembled on an AR-type firearm, 
allows the shooter to extend the clamp so it is under the shooter's 
forearm while gripping the pistol grip for additional support. This 
``stabilizing brace'' device did not design or redesign the firearm to 
be fired from the shoulder, and thus was not a ``short-barreled rifle'' 
under the NFA and GCA. But ATF noted that, if the firearm is fired from 
the shoulder, then the shooter designs or redesigns the firearm to be a 
rifle.\47\ Subsequently, the same company added a retractability 
feature to the ``stabilizing brace'' that allowed it to extend toward 
the shooter.\48\ On January 18, 2017, FATD determined that a pistol 
equipped with the adjustable feature would still not be subject to NFA 
controls.\49\
---------------------------------------------------------------------------

    \47\ Letter from ATF #304679 (Oct. 3, 2016).
    \48\ Although ATF had opined earlier that retractability was a 
feature commonly associated with shoulder stocks, see Letter from 
ATF #303984 (Nov. 30, 2015), ATF subsequently opined that a 
``stabilizing brace'' could be adjustable, see Letter from ATF 
#304296 (Dec. 22, 2015).
    \49\ Letter from ATF # 304511 (Jan. 18, 2017). ATF also issued a 
clarifying letter to the same company on January 30, 2017, regarding 
length of pull. Specifically, FATD defined ``length of pull'' as ``a 
measurement found on shoulder-fired weapons, generally measured from 
the center of the trigger to the center of the buttplate/
buttstock.'' FATD research determined the average length of pull for 
a shoulder-fired weapon is approximately 13-\1/2\-14-\1/2\ inches 
and the installation of a stabilizing brace to a pistol resulting in 
a similar length of pull would be characteristic of a shoulder-fired 
weapon. Letter from ATF #304679A (Jan. 30, 2017).

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[[Page 6491]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.027

[GRAPHIC] [TIFF OMITTED] TR31JA23.028

BILLING CODE 4110-FY-C
    As discussed above in this preamble, ATF stated in prior letters 
and in the 2015 Open Letter that using a ``stabilizing brace'' device 
as a shoulder stock would redesign a pistol with a barrel less than 16 
inches to a short-barreled rifle subject to the provisions of the NFA. 
On January 5, 2017, counsel to SB Tactical, LLC, submitted to ATF a 
request to reverse the 2015 Open Letter, arguing that determinations 
based on the use of a ``stabilizing brace'' device created ambiguity 
because the way the item is used does not alter the design. On March 
21, 2017, ATF responded by letter that: ``Although we stand by those 
conclusions [of the 2015 Open Letter], we agree the Open Letter may 
have generated some confusion concerning the analytical framework by 
which those conclusions were reached.'' \50\ ATF affirmatively 
concluded that incidental shouldering does not constitute a redesign of 
the firearm to be fired from the shoulder. The 2017 response letter 
also clarified:
---------------------------------------------------------------------------

    \50\ See Letter for Mark Barnes, Outside Counsel to SB Tactical, 
LLC, from Marvin G. Richardson, Assistant Director, Enforcement 
Programs and Services, ATF 90000:GM, 5000, Re: Reversal of ATF Open 
Letter on the Redesign of Stabilizing Braces (Mar. 21, 2017) 
(italics omitted) (made widely available to the public on various 
websites, for example, <a href="https://vpc.org/wp-content/uploads/2019/08/Pistol-brace-ATF-letter-March-21-2017.pdf">https://vpc.org/wp-content/uploads/2019/08/Pistol-brace-ATF-letter-March-21-2017.pdf</a> and <a href="https://www.thefirearmblog.com/blog/2017/04/24/breaking-news-update-atf-reversal-letter-sb-tactical/">https://www.thefirearmblog.com/blog/2017/04/24/breaking-news-update-atf-reversal-letter-sb-tactical/</a>).

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[[Page 6492]]

    [When] the shooter/possessor takes affirmative steps to 
configure the device for use as a shoulder-stock--for example, 
configuring the brace so as to permanently affix it to the end of a 
buffer tube, (thereby creating a length that has no other purpose 
than to facilitate its use as a stock), removing the arm-strap, or 
otherwise undermining its ability to be used as a brace--and then in 
fact shoots the firearm from the shoulder using the accessory as a 
shoulder stock, that person has objectively ``redesigned'' the 
firearm for purposes of the NFA. This conclusion is not based upon 
the mere fact that the firearm was fired from the shoulder at some 
point. Therefore, an NFA firearm has not necessarily been made when 
the device is not re-configured for use as a shoulder stock--even if 
the attached firearm happens to be fired from the shoulder.\51\
---------------------------------------------------------------------------

    \51\ Id.

    After this letter, ATF reviewed the ``Blade Pistol Stabilizer 
2.0,'' a new device redesigned after the first ``Blade Pistol 
Stabilizer.'' This new model included one attachment point for a strap 
or sling (as opposed to the first version's three attachment points) 
and a metal carbine buffer tube adjustment lever that enabled the 
operator to move the blade into four positions along the buffer tube. 
FATD reviewed both the initial Blade stabilizer and the Blade Pistol 
Stabilizer 2.0 without the sling or strap. For this submission, FATD 
examined the ``length of pull'' of the firearm and determined the 
maximum length of pull on an AR-type receiver with the ``Blade Pistol 
Stabilizer 2.0'' attached is 13-\3/16\ inches, which was just below the 
average length of pull for shoulder-fired weapons of 13-\1/2\ to 14-\1/
2\ inches. In a letter dated October 31, 2017, FATD concluded that the 
attachment of the ``blade pistol stabilizer'' to an AR-type firearm 
alone does not make an NFA weapon.\52\ The letter noted that this 
classification letter applied only to the ``Blade Pistol Stabilizer 
2.0,'' as submitted, and that any alternations to the device's design 
could change this classification.\53\
---------------------------------------------------------------------------

    \52\ Letter from ATF #307364 (Oct. 31, 2017).
    \53\ Id.
---------------------------------------------------------------------------

    By July 2018, FATD observed that SB Tactical had been marketing 
many of its ``braces'' as ``ATF compliant'' and with the following 
blanket statement: ``The Bureau of Alcohol, Tobacco, Firearms and 
Explosives has stated that the SB Tactical<SUP>TM</SUP> Pistol 
Stabilizing Brace is `legal to own, legal to purchase and legal to 
install on a pistol.' BATFE has consistently stated that a pistol with 
a Pistol Stabilizing Brace attached remains a pistol under the Gun 
Control Act when used as designed.'' \54\
---------------------------------------------------------------------------

    \54\ SB Tactical, Pistol Stabilizing Braces (Dec. 30, 2018), 
<a href="https://web.archive.org/web/20181230110445/https://www.sb-tactical.com/product-category/brace/">https://web.archive.org/web/20181230110445/https://www.sb-tactical.com/product-category/brace/</a>.
---------------------------------------------------------------------------

    On July 18, 2018, FATD notified SB Tactical that it had only 
evaluated 2 out of approximately 20 of their manufactured ``stabilizing 
brace'' models and concluded that only 2 submitted samples had not been 
``designed or intended to be used as shouldering devices'' such that 
attachment to a pistol did not convert that firearm to a short-barreled 
rifle. FATD also noted that any change in the submitted design could 
change its classification. Many of the other models sold by SB 
Tactical, which FATD had not evaluated, had been advertised as being 
based on shoulder stock designs. ATF's letter specifically stated that 
``FTISB does not approve `stabilizing braces' which are similar or 
based off shoulder stock designs.'' \55\ The letter requested the 
manufacturer to cease false advertisement of products as ``ATF 
approved,'' as a majority of them had not been evaluated by ATF, much 
less ``approved.'' \56\
---------------------------------------------------------------------------

    \55\ Letter from ATF #308999 (July 18, 2018) (emphasis omitted).
    \56\ Id.
---------------------------------------------------------------------------

    Moreover, toward the end of 2018, ATF recognized and informed 
requestors of classifications that, to effectively evaluate how an 
accessory affects the classification of a firearm under Federal law, 
FATD needed to examine the overall configuration of a firearm with the 
accessory (including purported ``stabilizing brace'') installed. ATF 
informed requestors that, except in cases of conditional import 
determinations, it would not issue a determination on an accessory 
alone unless it was attached to the submitted firearm.\57\
---------------------------------------------------------------------------

    \57\ See, e.g., Letter from ATF #304547 (Dec. 17, 2018); Letter 
from ATF #304678 (Dec. 17, 2018); Letter from ATF #307644 (Dec. 17, 
2018); Letter from ATF #308208 (Dec. 17, 2018); Letter from ATF 
#309044 (Dec. 17, 2018); Letter from ATF #309140 (Dec. 17, 2018); 
Letter from ATF #309515 (Dec. 17, 2018); Letter from ATF #309583 
(Dec. 17, 2018); Letter from ATF #309742 (Dec. 17, 2018); Letter 
from ATF #309751 (Dec. 17, 2018); Letter from ATF #308318 (Dec. 17, 
2018); Letter from ATF #309516 (Jan. 31, 2019); Letter from ATF 
#309807 (Feb. 1, 2019); Letter from ATF #304747 (Feb. 12, 2019); 
Letter from ATF #309861 (Feb. 12, 2019).
---------------------------------------------------------------------------

    On March 3, 2020, FATD examined two firearms, each equipped with a 
different ``stabilizing brace'' model (SBL Mini and SBA3), for one 
requestor.\58\ The first firearm equipped with an SBL Mini ``brace'' 
device was determined to be a pistol based on all the objective design 
features, including the design of the attached brace that wrapped 
almost completely around the shooter's forearm, the rear surface area 
of the device, and the firearm's shorter length of pull when compared 
against typical AR-type shoulder-fired weapons.\59\
---------------------------------------------------------------------------

    \58\ Letter from ATF #311123 (Mar. 3, 2020); Letter from ATF 
#311127 (Mar. 3, 2020).
    \59\ Letter from ATF #311123 (Mar. 3, 2020). Both 
classifications provided:
    This letter is not a final classification letter and does not 
constitute final agency action. However, it represents our current 
analysis based on the information we have, and we offer this letter 
for your review in advance of issuing a final classification letter. 
If you have additional information you want to submit to ATF before 
it issues its final classification, you may send the information in 
writing within 10 days from the date of this letter. You may also, 
within the 10 day period, request an in-person meeting to present 
this additional information provided the meeting takes place within 
10 days of the request. Please submit written comments or a request 
for an in-person meeting via email to <a href="/cdn-cgi/l/email-protection#9afcf3e8ffc5eefff9f2dafbeefcb4fdf5ec"><span class="__cf_email__" data-cfemail="096f607b6c567d6c6a6149687d6f276e667f">[email&#160;protected]</span></a>. If 
additional information is received, it will be included in the 
analysis when the final classification is sent to you.
    Letter from ATF #311123 (Mar. 3, 2020); Letter from ATF #311127 
(Mar. 3, 2020).
[GRAPHIC] [TIFF OMITTED] TR31JA23.029


[[Page 6493]]


    The second firearm equipped with an SBA3 ``brace'' device was 
determined to be a short-barreled rifle. FATD reviewed all the 
objective design features of the submitted firearm, including the 
similarity of the SBA3 to known shoulder stocks in form and function, 
the rear hardened surface area of the SBA3, the utilization of a 
standard AR-type Mil-Spec carbine receiver extension, and a ``length of 
pull'' useful for shouldering the firearm. FATD concluded that all 
these factors ``combine to provide objective design features consistent 
with weapons designed and intended to be fired from the shoulder.'' 
\60\
---------------------------------------------------------------------------

    \60\ Letter from ATF #311127 (Mar. 3, 2020).
    [GRAPHIC] [TIFF OMITTED] TR31JA23.030
    
    In June 2020, ATF classified another firearm equipped with a 
``proprietary Pistol Stabilizing Brace'' that incorporated guide rails 
that are identical to the same rifle-type firearm the manufacturer sold 
as a short-barreled rifle (both of which are pictured below).\61\ The 
guide rails permitted the adjustment of the ``stabilizing brace'' 
further rearward, the attached ``stabilizing brace'' provided a larger 
rear surface area compared to the traditional stock on the company's 
rifle-type firearm, and it had a length of pull of approximately 13-\9/
16\ inches. Further, the Velcro straps and flaps of the ``brace'' 
design had been reduced in size from the SB15 ``stabilizing brace'' and 
were not long enough to wrap around the shooter's arm.\62\ ATF's 
classification concluded that the objective design features of the 
accessory did not support the manufacturer's stated intent, but instead 
supported the conclusion that the accessory had been designed and 
intended to be used as a shouldering device and, therefore, the firearm 
with the ``brace'' device attached is designed, made, and intended to 
be fired from the shoulder.\63\
---------------------------------------------------------------------------

    \61\ Letter from ATF # 314200 (June 15, 2020).
    \62\ Id.
    \63\ Id.

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[[Page 6494]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.031

    On June 16, 2020, seven members of the House of Representatives 
wrote to DOJ and ATF leaders expressing a ``deep[ ] concern[ ]'' about 
ATF's ``practice of relying on arbitrary, non-public standards to 
promulgate general firearms policy hidden from public scrutiny and 
awareness.'' \64\ The congressional letter asked specific questions 
regarding the criteria ATF uses to determine whether a firearm is 
designed and intended to be fired from the shoulder; specific 
publications available for Americans to determine whether their 
firearms are designed and intended to be fired from the shoulder; and 
how many firearms equipped with stabilizing braces FATD had 
examined.\65\
---------------------------------------------------------------------------

    \64\ Letter for William Barr, Attorney General, and Regina 
Lombardo, Acting Director, ATF, from Matthew Gaetz, United States 
Representative, et al. (June 16, 2020), <a href="https://gaetz.house.gov/sites/gaetz.house.gov/files/wysiwyg_uploaded/For%20Web%206-16-2020%20DOJ-ATF%20pistol%20brace%20letter%20final.pdf">https://gaetz.house.gov/sites/gaetz.house.gov/files/wysiwyg_uploaded/For%20Web%206-16-2020%20DOJ-ATF%20pistol%20brace%20letter%20final.pdf</a>.
    \65\ Id.
---------------------------------------------------------------------------

    By late 2020, ATF concluded that: (1) previous ATF classification 
determinations had led to confusion and there was a need to provide 
clarity to the firearm industry and public on how ATF evaluates 
firearms equipped with a ``stabilizing brace''; (2) manufacturers were 
adding to the confusion by labeling ``stabilizing braces'' that ATF had 
not evaluated as ``ATF compliant''; and (3) as discussed in section 
IV.B.1.c of this preamble, these ``braces'' were being used with 
firearms extensively to create short-barreled rifles without following 
NFA requirements. As a result, ATF first published a Notice in the 
Federal Register titled, ``Objective Factors for Classifying Weapons 
with `Stabilizing Braces' '' on December 18, 2020. 85 FR 82516. 
However, the Department withdrew the Notice on December 31, 2020. 
Objective Factors for Classifying Weapons With ``Stabilizing Braces''; 
Withdrawal of Guidance, 85 FR 86948.

III. Notice of Proposed Rulemaking

    On June 10, 2021, the Department published in the Federal Register 
an NPRM titled, ``Factoring Criteria for Firearms with Attached 
`Stabilizing Braces','' proposing changes to the definition of 
``rifle'' in 27 CFR 478.11 and 479.11 to clarify when a firearm with an 
attached ``stabilizing brace'' falls under the definition of ``rifle.'' 
86 FR at 30826. The Department also proposed publishing the factors or 
criteria that ATF considers when it evaluates firearms equipped with a 
purported ``stabilizing brace.'' The factors discussed in the NPRM 
will, under the final rule, continue to help determine whether a weapon 
meets the statutory definition of a ``rifle'' or ``short-barreled 
rifle'' under the GCA and a ``rifle'' or ``firearm,'' i.e., a short-
barreled rifle, subject to regulation under the NFA. The NPRM included 
the factors on a new, proposed worksheet, ``ATF Worksheet 4999,'' that 
ATF proposed to rely on when making firearms classifications. That 
worksheet proposed assigning points to various criteria as an indicator 
of whether the ``brace'' device is suitable for shouldering and whether 
the firearm overall is designed and intended to be fired from the 
shoulder. The comment period for the NPRM closed on September 8, 2021. 
Id. at 30826, 30828-29.

A. Definition of ``Rifle''

    The Department proposed amendments to clarify the definition of 
``rifle'' by adding at the end of the current definition a sentence 
stating that the ``term shall include any weapon with a rifled barrel 
equipped with an accessory or component purported to assist the shooter 
stabilize the weapon while shooting with one hand, commonly referred to 
as a `stabilizing brace,' that has objective design features and 
characteristics that facilitate shoulder fire, as indicated on 
Factoring Criteria for Rifled Barrel Weapons with Accessories commonly 
referred to as `Stabilizing Braces,' ATF Worksheet 4999.'' Id. at 
30851.
    In the NPRM, the Department briefly discussed the history of the 
first forearm ``brace'' submitted to ATF in 2012, the purpose for which 
the ``brace'' was designed as described by the developer, and the 
inquiry to ATF on whether the addition of that ``brace'' device to a 
pistol, such as an AR-15 type pistol, would convert or alter the 
firearm's classification to a ``rifle,'' and thus potentially a 
``firearm'' under the NFA. Id. at 30827. As discussed in section II.B 
of this preamble, ATF concluded at the time that the addition of that 
prototype ``stabilizing brace'' device did not convert that weapon to 
be fired from the shoulder and that the weapon with the submitted 
``brace'' device was not

[[Page 6495]]

``designed and intended to be fired from the shoulder.''
    The NPRM made clear that, after the addition of an accessory or 
component that is marketed as a ``stabilizing brace'' to a pistol, the 
resulting braced firearm may still be classified as a pistol. 
Classifying a firearm based on a limited or single factor (e.g., the 
marketing label of the manufacturer that the item is a ``stabilizing 
brace'') ``has the potential to be significantly overinclusive or 
underinclusive.'' \66\ The NPRM explained the importance of properly 
classifying firearms subject to the NFA, given that short-barreled 
rifles are among the firearms considered ``unusual and dangerous,'' and 
that firearms with ``stabilizing braces'' have been used in at least 
two mass shootings, with the shooters in both instances reportedly 
using the ``brace'' as a shoulder stock.\67\ These incidents 
demonstrated the deadly efficacy of attaching certain types of 
``braces'' to pistols to create short-barreled rifles. 86 FR at 30828.
---------------------------------------------------------------------------

    \66\ Innovator Enters., Inc. v. Jones, 28 F. Supp. 3d 14, 25 
(D.D.C. 2014).
    \67\ See, e.g., Cameron Knight, Dayton Shooter Used a Modified 
Gun that May have Exploited a Legal Loophole, USA Today (published 
Aug. 5, 2019, updated Aug. 6, 2019), <a href="https://www.usatoday.com/story/news/nation/2019/08/05/dayton-shooter-used-gun-may-have-exploited-legal-loophole/1927566001/">https://www.usatoday.com/story/news/nation/2019/08/05/dayton-shooter-used-gun-may-have-exploited-legal-loophole/1927566001/</a> (the firearm used in a shooting killing 9 
people and wounding 14 had a ``pistol brace'' used to ``skirt[ ]'' 
regulation of short-barrel rifles); Melissa Macaya et al., 10 Killed 
in Colorado Grocery Store Shooting, CNN (updated Mar. 23, 2021), 
<a href="https://www.cnn.com/us/live-news/boulder-colorado-shooting-3-23-21/h_0c662370eefaeff05eac3ef8d5f29e94">https://www.cnn.com/us/live-news/boulder-colorado-shooting-3-23-21/h_0c662370eefaeff05eac3ef8d5f29e94</a> (reporting that the firearm used 
in a shooting that killed 10 was an AR-15 pistol with an ``arm 
brace'').
---------------------------------------------------------------------------

    The NPRM explained that, although ATF generally does not classify 
unregulated components or accessories alone under the GCA and NFA,\68\ 
there are times when the addition of a component or an accessory to a 
firearm can affect the firearm's classification. This is because: (1) a 
component's or an accessory's likely use in the general community may 
be relevant in assessing whether the manufacturer's or maker's 
purported intent with respect to the design of a firearm is consistent 
with the manufacturer's or maker's actual intent; \69\ and (2) the 
design of a component or an accessory may cause a firearm to fall 
within a particular statutory definition when attached to the 
firearm.\70\ A ``stabilizing brace,'' of which there are several 
variations, is one such component or an accessory that may change the 
classification of the firearm to which it is attached. Id.
---------------------------------------------------------------------------

    \68\ ATF does, however, make these types of classifications 
under the AECA, 22 U.S.C. 2778, with respect to the permanent 
importation of ``defense articles.'' Additionally, ATF provides 
classifications of barrels or ammunition as non-sporting for 
importability purposes under the GCA under 18 U.S.C. 922(l) and 
925(d). The origin of certain firearms parts and accessories listed 
under 27 CFR 478.39 may also be considered by ATF in the enforcement 
of 18 U.S.C. 922(l).
    \69\ Cf. Posters `N' Things v. United States, 511 U.S. 513, 521-
22 (1994) (Whether an item is ``primarily intended'' for a specified 
use is an objective analysis that must focus on the ``likely use'' 
of that item in the general community, rather than the subjective 
intent of a particular person.).
    \70\ The NPRM provided examples of where attachment of an 
accessory can affect a firearm's classification. These included: the 
attachment of a forward secondary grip to a ``pistol'' where the 
resulting firearm would no longer be designed to be held and fired 
with a single hand, see United States v. Black, 739 F.3d 931, 934-36 
(6th Cir. 2014); and a wallet holster where the handgun can be fired 
while inserted, thus changing the classification of these handguns 
into an ``any other weapon'' under 26 U.S.C. 5845(e), see FFL 
Newsletter 5-6 (Aug. 1997), <a href="https://www.atf.gov/firearms/docs/newsletter/federal-firearms-licensees-newsletter-%E2%80%93-august-1997/download">https://www.atf.gov/firearms/docs/newsletter/federal-firearms-licensees-newsletter-%E2%80%93-august-1997/download</a>.
---------------------------------------------------------------------------

    The Department reiterated in the NPRM that it has been ATF's 
longstanding and public position that a firearm does not evade 
classification under the NFA merely because the firearm is configured 
with a device marketed as a ``stabilizing brace.'' \71\ When a 
purported ``stabilizing brace'' and an attached weapon's objective 
design features indicate that the firearm is actually designed and 
intended to be fired from the shoulder, such weapon may fall within the 
scope of the NFA as a short-barreled rifle, thus requiring registration 
and payment of tax. As described in section II.B of this preamble, ATF 
has evaluated on a case-by-case basis several models of ``stabilizing 
braces'' and has considered whether a particular firearm configured 
with a ``stabilizing brace'' has the objective features of a firearm 
designed and intended to be fired from the shoulder, thus subjecting it 
to the requirements of the NFA and GCA. The use of a ``stabilizing 
brace'' cannot be a tool to circumvent the NFA and GCA and the 
prohibition on the unregistered possession of short-barreled rifles.
---------------------------------------------------------------------------

    \71\ 86 FR at 30828 & n.13.
---------------------------------------------------------------------------

    In the NPRM, the Department explained that the objective design 
features of a firearm are relevant to determining whether the NFA's 
requirements apply, given that the purpose of the NFA is ``to regulate 
certain weapons likely to be used for criminal purposes.'' United 
States v. Thompson/Center Arms Co., 504 U.S. 505, 517 (1992); see also 
id. (``It is of course clear from the face of the Act that the NFA's 
object was to regulate certain weapons likely to be used for criminal 
purposes, just as the regulation of short-barreled rifles, for example, 
addresses a concealable weapon likely to be so used.''). This is the 
case even when a manufacturer characterizes or markets a firearm 
accessory in a manner that suggests a use that does not correspond to 
its objective design. The characterization of an accessory by the 
manufacturer, including assertions in advertising, may be relevant, but 
is not dispositive. ATF considers the objective design features, the 
manufacturer's or maker's intent as reflected in marketing materials, 
and other information demonstrating likely use of the firearm in the 
general community in deciding whether the weapon is designed and 
intended to be fired from the shoulder. Where ATF's evaluation of a 
submitted sample demonstrates that the objective design features of the 
firearm, as configured, do not support the manufacturer's purported 
intent and, in fact, suggest a different intent, then ATF may conclude 
that the firearm ought not be classified on the basis of the 
manufacturer's purported intent, thus ensuring effective enforcement of 
Federal law. See Sig Sauer, Inc. v. Brandon, 826 F.3d 598, 601-02 (1st 
Cir. 2016) (objective design features could supersede a manufacturer's 
``asserti[on]'' about the ``intended use,'' as a different conclusion 
would allow easy circumvention of the NFA); see also 86 FR at 30828.
    The Department also explained that, with the increase in production 
of rifled-barrel weapons with ``stabilizing braces,'' ATF saw an 
increase in the requests for classifications of this kind of firearm 
design. As described above, ATF issued several letters examining 
``brace'' devices and also particular firearms equipped with 
``stabilizing braces'' for industry and in criminal cases. In its 
recent determinations, FATD discussed various objective features that 
are considered when evaluating whether a firearm that is equipped with 
a ``stabilizing brace'' is designed and intended to be fired from the 
shoulder. Recognizing the criticism from various parties that ATF had 
not widely published a definitive approach in the application of that 
criteria, the NPRM proposed a worksheet listing the criteria or factors 
that FATD considers when evaluating firearm samples that are submitted 
with an attached ``stabilizing brace'' or similar component or 
accessory. The worksheet, titled ``Factoring Criteria for Rifled Barrel 
Weapons with Accessories commonly referred to as `Stabilizing Braces,' 
ATF Worksheet 4999,'' was proposed to allow individuals or members of 
the firearms industry to evaluate whether a weapon incorporating a 
``stabilizing brace'' that

[[Page 6496]]

they intended to submit to FATD or to offer for sale would be 
considered a ``short-barreled rifle'' subject to NFA requirements. The 
worksheet assigned points to various criteria, as further described 
below.
    The NPRM explained that the proposed criteria and worksheet did not 
apply to firearms commonly referred to as ``pistol grip shotguns,'' as 
they were never designed to be held and fired using one hand (e.g., 
Mossberg Shockwave, Remington Tac-14).\72\ See also 86 FR at 30828-29.
---------------------------------------------------------------------------

    \72\ See section II.B of this preamble for discussion on 
``pistol grip shotgun'' classification letter.
---------------------------------------------------------------------------

    As discussed in section II.B of this preamble, these firearms are 
specifically designed to be fired with two hands. ATF has always 
classified these weapons as ``firearms'' under the GCA, and not as 
``shotguns,'' because they do not incorporate a shoulder stock and are 
not designed and intended to be fired from the shoulder like a shotgun. 
Nor has ATF classified these weapons as ``pistols,'' as they are not 
designed to be held and fired in one hand like a pistol. Thus, the 
addition of a ``stabilizing brace'' does not assist with single-handed 
firing, but instead provides surface area that allows for firing from 
the shoulder. Therefore, a ``pistol grip shotgun'' equipped with a 
``stabilizing brace'' and a barrel of less than 18 inches is an NFA 
``firearm,'' i.e., a short-barreled shotgun.\73\
---------------------------------------------------------------------------

    \73\ As mentioned above, any classification that provides that a 
``pistol grip shotgun'' is not an NFA firearm is no longer valid or 
authoritative and should be resubmitted to FATD for evaluation.
---------------------------------------------------------------------------

B. Application of Proposed ATF Worksheet 4999

    Similar to the Factoring Criteria for Weapons, ATF Form 4590 
(``Form 4590''), which is used for the importation of pistols and 
revolvers, the proposed ATF Worksheet 4999 contained a point system 
assigning a weighted value to various characteristics of the fully 
assembled firearm, as configured when submitted for classification. 
Under the proposed worksheet, a firearm accumulating fewer than 4 
points in Section II (Accessory Characteristics), and fewer than 4 
points in Section III (Configuration of Weapon), would have been 
generally determined not to be designed to be fired from the shoulder, 
unless there was evidence that the manufacturer or maker expressly 
intended to design the weapon to be fired from the shoulder. A firearm 
accumulating 4 points or more in Section II or Section III would have 
indicated that not only is the ``brace'' device more suitable as a 
shoulder stock but also that the firearm's overall configuration with 
the ``brace'' attached was designed, made, and intended to be fired 
from the shoulder. See 86 FR at 30828-30.
    The NPRM explained why certain prerequisites (i.e., weapon weight 
and overall length) would be considered first to determine if the host 
firearm would be a suitable weapon for a ``stabilizing brace.'' The 
Department believed that these prerequisites would help ATF to 
determine if the host firearm could be immediately identified as a 
rifle, as defined by the applicable statutes. Moreover, as discussed, 
``stabilizing braces'' were originally marketed as intended to assist 
persons with disabilities and others lacking sufficient grip strength 
to control heavy pistols. ATF had found the attachment of a 
``stabilizing brace'' to a standard pistol that is light enough to hold 
with no additional assistance to be impractical and hence also to be a 
likely preliminary indicator that the attachment changes the firearm 
into a firearm designed and intended to be fired from the shoulder. 
Similarly, the attachment of a ``stabilizing brace'' to a firearm that 
is so heavy or difficult to control that the firearm cannot feasibly be 
held with one hand would also indicate the firearm is a rifle. For 
these types of heavy pistols, ATF reasoned that the purported 
``stabilizing brace'' would have no design function other than to 
facilitate the firing of the weapon from the shoulder. Id. at 30829.
    The proposed Worksheet 4999 assigned point values for the objective 
design characteristics or features that are common to rifles, features 
associated with shoulder stocks, and features limiting the ability to 
use the ``stabilizing brace'' as an actual ``brace.'' These point 
values ranged from 0 to 4 points based upon the degree of the 
indicator, explained as follows:

<bullet> 1 point: Minor Indicator (the weapon could be fired from the 
shoulder)
<bullet> 2 points: Moderate Indicator (the weapon may be designed and 
intended to be fired from the shoulder)
<bullet> 3 points: Strong Indicator (the weapon is likely designed and 
intended to be fired from the shoulder)
<bullet> 4 points: Decisive Indicator (the weapon is designed and 
intended to be fired from the shoulder)

    The point values associated with particular features or designs 
were based upon their relative importance in classifying the firearm 
under Federal law. Therefore, more points were assigned to design 
features that more strongly indicated the manufacturer or maker's 
intent was to produce a shoulder-fired weapon.
    The various factors on the Worksheet 4999 fell into two 
categories--Accessory Characteristics and Configuration of the Weapon. 
The NPRM explained the criteria that would be considered and why they 
were important in making classifications of firearms with attached 
``stabilizing braces.'' Id. at 30831-34. As stated above, if the total 
point value of the firearm submitted was equal to or greater than 4--in 
either Section II (Accessory Characteristics) or III (Configuration of 
a Weapon)--then the firearm, with the attached ``stabilizing brace,'' 
would be determined to be ``designed or redesigned, made or remade, and 
intended to be fired from the shoulder,'' or a ``rifle'' under the GCA 
and NFA. And, if the attached barrel was also less than 16 inches, the 
firearm would be classified as a ``short-barreled rifle'' under the GCA 
and come under the NFA definition of ``firearm.''
    Section IV of the NPRM provided examples of how the factoring 
criteria in Worksheet 4999 would be implemented with respect to three 
weapons with common ``stabilizing braces'' attached. Id. at 30834-43. 
Under these examples, the NPRM showed that, in applying the factors of 
the worksheet: (1) an AR-Type Firearm with SB-Mini Accessory would be 
classified as a pistol with an attached ``stabilizing brace'' because 
it garnered three points in each of Section II and III; (2) an AR-Type 
Firearm with SBA3 Accessory would be classified as a ``short-barreled 
rifle'' subject to the NFA because it garnered eight points in Section 
II and five points in Section III; and (3) an AR-Type Firearm with 
Shockwave Blade Accessory as configured would also be classified as a 
short-barreled rifle subject to the NFA because it garnered five points 
in Section II and 14 points in Section III.
    In the NPRM, the Department also noted that ATF issued 
classifications to some makers or manufacturers without having had the 
benefit of evaluating the ``brace'' when attached to a firearm. The 
NPRM encouraged any maker or manufacturer who received a classification 
prior to the effective date of the final rule to resubmit the weapon 
with the attached ``stabilizing brace'' to ensure that the 
classification is consistent with the rule and to avoid any possible 
criminal or tax penalties for the continued manufacture, transfer, or 
possession of a NFA firearm. 86 FR at 30829.
    As described above, FATD's classifications allow industry members 
to plan and develop products that comply with the law, thereby reducing 
their risk of incurring criminal or civil

[[Page 6497]]

penalties or the need for corrective actions, including a recall by the 
manufacturer. The Department recognized that the proposed clarification 
of the relevant statutory terms in the NFA and GCA with respect to 
weapons with an attached ``stabilizing brace'' device might have 
practical effects on industry members and members of the public, as 
they might make or manufacture, or already own, firearms with a 
``stabilizing brace'' attached. To assist affected persons and industry 
members, section V of the NPRM provided additional information in the 
preamble to aid them in complying with Federal laws and regulations. 
Id. at 30843-44.

IV. Analysis of Comments and Department Responses

    In response to the NPRM, ATF received over 237,000 comments. 
Submissions came from individuals, lawyers, government officials, and 
various interest groups. Of the comments reviewed, nearly 20,000 
comments expressed support for the proposed rule, of which just under 
18,000 were submitted by individuals as form letters, i.e., identical 
text that is often supplied by organizations or found online and 
recommended to be submitted to the agency as a comment. There were over 
217,000 comments opposed to aspects of the rule. Approximately 96,000 
comments were submitted as form letters and, of these, just over 25,000 
were submitted using the National Association for Gun Rights (``NAGR'') 
form letter. The commenters' grounds for support and opposition, along 
with specific concerns and suggestions, are discussed below.

A. Comments Received in Support

    Many commenters generally supported the rule. These commenters 
explained that while ``stabilizing braces'' were originally developed 
to assist those with physical disabilities shoot a firearm, pistol 
braces are frequently used to effectively turn firearms into short-
barreled rifles, making the firearms subject to registration 
requirements under the NFA.
    Numerous commenters argued that the adoption of this rule would 
promote public safety. Other commenters indicated that they favored 
greater regulation of firearms in general. One commenter, a retired 
military servicemember with familiarity with firearms, stated that if 
the weapon does not fit in a holster at the waist or shoulder, or can 
be hidden in a pocket, then it is not a handgun. Another commenter 
similarly agreed and said ``I love the 2A! Love my guns! Never give 
them up! That being said, if you put it to your shoulder it's a 
rifle!''
    Below, the Department sets forth and responds to the specific 
issues raised in comments that generally supported the NPRM.
1. Closes a Loophole and Prevents Circumventing the Law
Comments Received
    Numerous commenters stressed that this rule would help close the 
``Arm Brace Loophole,'' pointing out that while ``braces'' may be 
useful in certain instances, problems arise when they are made to 
function as a buttstock. For instance, commenters agreed with ATF that 
there are individuals who are trying to circumvent the law by calling a 
collapsible stock a ``brace'' when in reality the ``braces'' are being 
used as buttstocks. Commenters stated that these types of firearms are 
an ``attempt by many to create a short-barreled rifle under the guise 
of assisting shooters with disabilities.'' Another commenter stated 
that he has never understood selling ``pistols'' with attached 
``stabilizing braces'' because ``it was just a way to skirt the 
legislation already in place for short-barreled rifles.'' One 
commenter, who identified as a former gunsmith and licensee with 
experience in the firearms industry for over 15 years, stated that he 
has ``never seen anyone utilize a brace in the manner that it was 
originally designed.'' The commenter also stated that he has ``often 
found that the vast majority of `brace' designs cannot be actually used 
as intended.'' The commenter pointed out several types of weapons with 
braces, such as the CZ Evo Scorpion pistol, which are ``clearly 
[weapons] designed to be fired from the shoulder.'' The commenter 
strongly urged that all these weapons should be reclassified as NFA 
weapons, which is how he believes they should have been initially 
designated.
    Numerous commenters opined that firearms companies are simply 
trying to circumvent the law through the use of ``braces.'' One 
commenter stated that ``while arm braces have enabled disabled shooters 
to operate large-format pistols with one hand, the gun industry has 
sidestepped this intended use to market pistols equipped with arm 
braces as an alternative to `short-barreled rifles.''' Another 
commenter, a long-time shooting enthusiast, similarly opined that 
``[t]his whole thing has been a marketing tool to sell firearms to 
people that do not have enough knowledge to make informed purchasing 
decision.''
    Some commenters stated that this rule is long overdue. The 
commenters believed it is not hard for individuals to complete the NFA 
paperwork to register their short-barreled rifles and that it is not a 
significant cost on gun owners. One commenter indicated that gun owners 
who spend $1500 on an AR pistol should be able to afford the $200 tax 
to register it.
Department Response
    The Department acknowledges the commenters' support of the proposed 
rule. The definitions of ``rifle'' under the GCA and NFA include a 
weapon designed or redesigned, made or remade, and intended to be fired 
from the shoulder. 18 U.S.C. 921(a)(7), 26 U.S.C. 5845(c). The GCA and 
NFA do not ban or regulate ``stabilizing brace'' devices that are not 
attached to a firearm, and this rule does not have that effect, nor 
does it ban weapons equipped with a purported ``stabilizing brace.'' 
The Department agrees that while some ``stabilizing brace'' devices may 
assist an individual with disabilities, or limited mobility or 
strength, in stabilizing a large and heavy pistol, many purported 
``stabilizing braces,'' when attached to a weapon, result in a firearm 
with objective design features indicating the ``braced'' weapon is 
designed, made, and intended to be fired from the shoulder. 
Accordingly, they may appropriately be classified as a rifle and 
possibly a short-barreled rifle, depending on barrel length. As a 
result, the Department agrees with the commenters above that a weapon 
attached with a purported ``stabilizing brace'' may fall within the 
purview of the NFA and, if so, must satisfy statutory requirements.
    This rule amends the definition of ``rifle'' to clarify that the 
term ``designed or redesigned, made or remade, and intended to be fired 
from the shoulder'' includes a weapon that is equipped with an 
accessory, component, or other rearward attachment (e.g., a 
``stabilizing brace'') that provides surface area that allows the 
weapon to be fired from the shoulder, provided other factors, as listed 
in the amended regulations, indicate that the weapon is designed, made, 
and intended to be fired from the shoulder. These other factors are: 
(1) whether the weapon has a weight or length consistent with the 
weight or length of similarly designed rifles; (2) whether the weapon 
has a length of pull, measured from the center of the trigger to the 
center of the shoulder stock or other rearward accessory, component, or 
attachment (including an adjustable or telescoping attachment with the 
ability to lock into various

[[Page 6498]]

positions along a buffer tube, receiver extension, or other attachment 
method), that is consistent with similarly designed rifles; (3) whether 
the weapon is equipped with sights or a scope with eye relief that 
require the weapon to be fired from the shoulder in order to be used as 
designed; (4) whether the surface area that allows the weapon to be 
fired from the shoulder is created by a buffer tube, receiver 
extension, or any other accessory, component, or other rearward 
attachment that is necessary for the cycle of operations; (5) the 
manufacturer's direct and indirect marketing and promotional materials 
indicating the intended use of the weapon; and (6) information 
demonstrating the likely use of the weapon in the general community.
    For the reasons discussed in section IV.B of this preamble, the 
Department incorporated the relevant objective design features (as 
described in Sec. Sec.  478.11(2)(i)-(iv) and 479.11(2)(i)-(iv) of the 
final regulatory text) directly from the NPRM and proposed Worksheet 
4999. In addition, as explained below, the Department has incorporated 
the factors described in Sec. Sec.  478.11(2)(v)-(vi) and 479.11(2)(v)-
(vi). Although the factors in these paragraphs are not objective design 
features of the weapon, the NPRM observed that evidence other than 
objective design features would sometimes play a role in classifying a 
weapon. For example, the NPRM stated that certain weapons, based on 
their point totals on the proposed worksheet, would not be classified 
as rifles ``unless there [was] evidence that the manufacturer or maker 
expressly intended to design the weapon to be fired from the 
shoulder.'' 86 FR at 30829. The Department believes that the final rule 
should likewise account for the possibility that factors other than 
objective design features may affect a weapon's classification, and the 
final rule accordingly includes Sec. Sec.  478.11(2)(v)-(vi) and 
479.11(2)(v)-(vi).
    The Department also agrees with commenters that the procedure to 
register short-barreled rifles, which include in certain instances 
firearms with ``stabilizing braces,'' is through an ATF Form 1, 
Application to Make and Register a Firearm (``Form 1''), with the 
approval of the Attorney General, or, for SOT holders, an ATF Form 2, 
Notice of Firearms Manufactured or Imported (``Form 2''). See 26 U.S.C. 
5822; 27 CFR 479.62, 479.68. Usually, each maker submitting a Form 1 
must pay a $200 making tax on each NFA firearm made.\74\ See 26 U.S.C. 
5821. As described in sections IV.B.8.e, IV.B.9.b-c, and V.C of this 
preamble, however, the Department will exercise its enforcement 
discretion not to enforce the making tax on any individual or entity 
for weapons affected by this rule that are currently in the possession 
of the individual or entity, provided the individual or entity 
registers the firearm by May 31, 2023. See 26 U.S.C. 7805(b) (1994) 
(granting discretion to determine retroactive effect of regulations 
relating to the internal revenue laws). Individuals and FFLs without an 
SOT would submit an electronic version of Form 1 (``E-Form 1'') for the 
affected short-barreled rifles with an attached ``stabilizing brace'' 
in their possession as of the date this rule is published. Type 7 FFLs 
with an SOT, in contrast, would submit an electronic version of Form 2 
(``E-Form 2'') for the affected short-barreled rifles with an attached 
``stabilizing brace'' in their inventory as of the date this rule is 
published.
---------------------------------------------------------------------------

    \74\ Submission of a Form 2, in contrast, does not require an 
accompanying tax payment. Thus, for weapons registered on a Form 2, 
there is no tax payment for ATF to forbear from collecting.
---------------------------------------------------------------------------

    Provided the registration form is properly submitted and documented 
within the defined time period, the Department will consider 
individuals and entities to be in compliance with the statutory 
requirements between the date on which a person's application is filed 
and the date a person receives ATF approval or disapproval of the 
application. After the 120-day registration period following the 
publication of this rule, registration of previously made or 
manufactured weapons with ``stabilizing braces'' that constitute NFA 
firearms will not be permitted. Any person in possession of a short-
barreled rifle for which an E-Form 1 or E-Form 2 has not been submitted 
to ATF within the defined time period will be in violation of the NFA, 
and ATF may take enforcement action. Individuals or entities that do 
not wish to register their firearms may refer to section V.B of this 
preamble for other options.
2. Enhances Public Safety
Comments Received
    Comments submitted by the attorneys representing the cities of 
Boulder, Colorado, and Dayton, Ohio, noted that short-barreled rifles 
are uniquely dangerous because they ``combine the power of shoulder-
mounted rifles with the concealability of handguns'' and that 
``stabilizing braces'' are functionally equivalent to shoulder stocks. 
The commenters observed that ``the Dayton and Boulder shooters' pistol 
braces allowed them to better hide their weapons and better deploy them 
to attack dozens of innocent victims.'' This rule, the commenters 
argued, ``would be a positive step in helping cities like Boulder and 
Dayton protect their citizens . . . from devasting attacks'' from 
firearms with an attached ``stabilizing brace.''
    Numerous commenters likewise opined that dangerous people have 
manipulated the use of ``stabilizing braces'' on pistols to create 
assault-style pistols that make the firearm more dangerous because it 
can be easier to conceal, and to shoot more bullets faster. They argued 
that the rise of these weapons and the ease in which they can be 
acquired greatly impacts public safety.
    Similarly, other commenters, including former law enforcement 
officers, voiced support for the rule and reclassification of weapons 
with an attached ``stabilizing brace'' as NFA firearms because they are 
effectively short-barreled rifles, which, as evidenced by their use in 
the Boulder and Dayton mass shootings, ``are unusually dangerous 
because they can be easily concealed like a handgun but have the 
firepower and accuracy of a rifle.'' Commenters agreed this rule change 
was a good measure because ``[m]ore and more often these braces are 
showing up on crime gun and it is alarming.''
    Several commenters approved of the fact that the rule addresses the 
threat to public safety ``while still allowing for disabled shooters to 
utilize arm braces.'' One commenter stated that ``[e]nacting this rule 
will continue to enable disabled shooters to purchase and use these 
devices, but will better protect the American public from gun 
violence.''
Department Response
    The Department acknowledges the commenters' support and agrees this 
rule will benefit public safety. Short-barreled rifles have been 
recognized by Congress and the courts as the type of uniquely dangerous 
weapons appropriately regulated under the NFA. Courts have recognized 
the dangerousness and uniqueness of NFA firearms, and that the 
possession of unregistered NFA firearms poses a danger to the 
community. See United States v. Jennings, 195 F.3d 795, 799 (5th Cir. 
1999) (Congress determined that the unregistered possession of the 
particular firearms regulated under the NFA should be outlawed because 
of ``the virtual inevitability that such possession will result in 
violence.''); United States v. Cox, 906 F.3d 1170,

[[Page 6499]]

1184 (10th Cir. 2018) (explaining the Supreme Court's conclusion that 
```the historical tradition of prohibiting the carrying of dangerous 
and unusual weapons' supported limiting the Second Amendment's 
protection to weapons `in common use at the time' of ratification'' 
(quoting District of Columbia v. Heller, 554 U.S. 570, 626-27 (2008)); 
United States v. Gonzalez, No. 2:10-cr-00967, 2011 WL 5288727, at *5 
(D. Utah Nov. 2, 2011) (``Congress specifically found that `short-
barreled rifles are primarily weapons of war and have no appropriate 
sporting use or use for personal protection.''' (quoting S. Rep. No. 
90-1501, at 28 (1968))).
    Short-barreled rifles specifically are dangerous and unusual due to 
both their concealability and their heightened ability to cause 
damage--a function of the projectile design, caliber, and propellant 
powder used in the ammunition and the ability to shoulder the firearm 
for better accuracy. See United States v. Marzzarella, 614 F.3d 85, 90-
95 (3d Cir. 2010) (explaining that a long gun with a shortened barrel 
is both dangerous and unusual because ``its concealability fosters its 
use in illicit activity,'' and ``because of its heightened capability 
to cause damage''), abrogated on other grounds as stated in Frein v. 
Pennsylvania State Police, 47 F.4th 247, 253 (3d Cir. 2022); United 
States v. Amos, 501 F.3d 524, 531 (6th Cir. 2007) (McKeague, J., 
dissenting) (``[A] sawed-off shotgun can be concealed under a large 
shirt or coat . . . . [T]he combination of low, somewhat indiscriminate 
accuracy, large destructive power, and the ability to conceal . . . 
makes a sawed-off shotgun useful for only violence against another 
person, rather than, for example, against sport game.''); Bezet v. 
United States, 276 F. Supp. 3d 576, 611-12 (E.D. La. 2017) (``Prior to 
the enactment of the NFA, Congress recognized that the country 
struggled to control the violence wrought by `gangsters, racketeers, 
and professional criminals.' . . . Similarly to the GCA, the NFA was 
adopted by Congress to establish a nationwide system to regulate the 
sale, transfer, license, and manufacturing of certain `dangerous 
weapons' such as `machine guns, sawed-off shotguns, sawed-off rifles, 
and other firearms, other than pistols and revolvers, which may be 
concealed on the persons, and silencers.' . . . [T]he NFA targets 
`certain weapons likely to be used for criminal purposes.' '' 
(footnotes omitted.)), aff'd, 714 F. App'x 336 (5th Cir. 2017). Many 
firearms with ``stabilizing braces'' include a barrel of less than 16 
inches and the objective design features of a firearm designed and 
intended to be fired from the shoulder. These types of firearms are 
those that Congress sought to regulate, as confirmed by Federal courts.
    The Department also acknowledges that firearms equipped with 
``stabilizing braces'' have been used in two mass shootings, with 
shooters in both instances reportedly shouldering the ``brace'' as a 
shoulder stock, demonstrating the weapons' efficacy as ``short-barreled 
rifles.'' \75\ The compact size of these firearms also assists with 
concealability of a firearm with a large destructive power. Since 2014, 
the FTCB reports that there have been approximately 104 Federal 
criminal classifications where firearms equipped with a ``stabilizing 
brace'' have been received by FATD for classification as a part of 
criminal investigations. Further, since 2015, ATF reports that 
approximately 63 firearms with ``stabilizing braces'' have been traced 
in criminal investigations.\76\ ATF has approximately 105 firearms 
cases or investigations involving ``stabilizing brace'' devices.\77\
---------------------------------------------------------------------------

    \75\ See supra note 67.
    \76\ This information is drawn from the Firearms Tracing System 
(FTS) database maintained by ATF's National Tracing Center's (NTC) 
covering January 1, 2015, through November 1, 2022. The number of 
traced firearms equipped with a ``stabilizing brace'' device may be 
underreported because this information is captured in FTS when the 
user entering the firearm information makes observations and enters 
relevant terms like ``brace'' or ``stabilizing brace'' in the 
``Additional Markings'' field of FTS.
    \77\ This information is from ATF's Office of Strategic 
Intelligence (OSII) covering January 1, 2015, through November 1, 
2022.
---------------------------------------------------------------------------

B. Comments Received in Opposition

    A majority of commenters opposed the proposed rule or any new 
regulation or registration requirements for firearms equipped with an 
attached ``stabilizing brace.'' Commenters broadly argued that ATF 
should not make any changes from previous determinations regarding 
``stabilizing braces,'' thus allowing owners of such attachments to 
continue using these items in their current configurations. As 
discussed below, many of the commenters that opposed the rule raised 
various concerns about the Department's proposed amendments to ATF 
regulations and the factors in the proposed Worksheet 4999. Commenters 
raised constitutional and statutory authority concerns and also 
concerns with denying persons with disabilities the use of a 
``stabilizing brace'' to assist with shooting a firearm. They further 
argued that the rule punishes law-abiding citizens and does not advance 
the Department's public safety goals. Commenters also questioned ATF's 
initial analysis regarding the costs of the rulemaking.
1. Statutory Concerns
a. Lack of Statutory Authority To Issue a Rule on ``Stabilizing 
Braces''
Comments Received
    Numerous commenters asserted that ATF is overstepping its authority 
and changing the scope of the law on its own. Commenters also stated 
that ATF is in the executive branch and not the legislative branch, and 
therefore it should not be creating new laws, which is allegedly what 
the proposed rule achieves. A few other commenters stated that while 
DOJ has some leeway in making recommendations to Congress, only 
Congress has the authority to make changes to the law.
    Commenters further asserted that ATF has no statutory authority to 
regulate or impose NFA controls on accessories such as secondary grips, 
sights and scopes, or peripheral accessories, including ``stabilizing 
braces.'' Another commenter argued that ATF's proposed criteria are 
``in support of a non-statutory analysis about whether a weapon can be 
more easily fired with one hand or two hands'' and that this is 
inconsistent with the NFA and GCA's obligation that the agency regulate 
weapon that are ``intended to be fired from the shoulder.'' For 
example, the commenter argued that several factors of Section III of 
proposed Worksheet 4999 violated the statute because they allowed ATF 
to assign points based on the presence of certain ``peripheral 
accessories'' or ``bipod/monopod accessories''; these accessories, 
according to the commenter, are not considered suitable for 
shouldering, and their inclusion on Worksheet 4999 was contrary to the 
plain text of the statute.
    Commenters asserted that not only is ATF beyond the scope of its 
authority under the GCA in issuing this rule but also that ATF has 
limited authority to promulgate regulations that are necessary to 
enforce the provisions of the GCA and NFA. These commenters believed 
the change proposed by this rule ``has the power of a Federal law that 
the American public did not get to vote on.'' Further, commenters 
argued that ``ATF is without authority to amend, supplement, 
reinterpret or rewrite the laws that Congress enacts, even to implement 
what the agency perceives to have been Congress' intent when passing 
the law. Rather it is ATF's responsibility to implement the law as it 
is written.'' (Emphases in the original.) At least one commenter noted 
that if the

[[Page 6500]]

intent of Congress is clear, the agency must not interpret the law in a 
way other than the original intent of Congress and that ATF cannot 
``simply add to the clear unambiguous definition of `rifle' provided by 
Congress.''
Department Response
    The Department does not agree that the rule exceeds the authority 
provided under law; the rule is interpreting the language of the 
statute as written. Moreover, as explained in section II.A of this 
preamble, the Attorney General is responsible for enforcing the GCA and 
NFA, and Congress provided authority to the Attorney General to 
promulgate regulations as are necessary to enforce the provisions of 
these laws. See 18 U.S.C. 926(a); 26 U.S.C. 7801(a)(2)(A), 7805(a). 
Congress and the Attorney General have delegated the responsibility for 
administering and enforcing the GCA and NFA to the Director of ATF, 
subject to the direction of the Attorney General and the Deputy 
Attorney General. See 26 U.S.C. 7801(a)(2); 28 U.S.C. 599A(b)(1), 
(c)(1); 28 CFR 0.130(a)(1)-(2); T.D. Order No. 221(2)(a), (d), 37 FR at 
11696-97. Accordingly, the Department and ATF have promulgated 
regulations to implement the GCA and NFA. See 27 CFR parts 478, 479. 
``Because [section] 926 authorizes the [Attorney General] to promulgate 
those regulations which are `necessary,' it almost inevitably confers 
some measure of discretion to determine what regulations are in fact 
`necessary.''' Nat'l Rifle Ass'n v. Brady, 914 F.2d 475, 479 (4th Cir. 
1990). Like reasoning applies to 26 U.S.C. 7805(a), which states in 
similar language that ``[the Attorney General] shall prescribe all 
needful rules and regulations for the enforcement of this title.'' And 
courts have long recognized that regulatory agencies do not establish 
rules to last forever. ``They are neither required nor supposed to 
regulate the present and the future within the inflexible limits of 
yesterday.'' Am. Trucking Ass'n v. Atchison, Topeka, and Santa Fe Ry. 
Co, 387 U.S. 397, 416 (1967).
    In the original GCA implementing regulations, ATF provided 
regulatory definitions for terms that Congress did not define in the 
statute. Internal Revenue Service, Department of the Treasury, 33 FR 
18555 (Dec. 14, 1968) (e.g., ``business premises'', ``curios or 
relics'', ``frame or receiver'', ``state of residence''). Since 1968, 
ATF has occasionally added definitions to the implementing regulations. 
See, e.g., Implementation of Public Law 104208, Omnibus Consolidated 
Appropriations Act of 1997 (96R-034P), 63 FR 35520 (June 30, 1998) 
(implementing definition of ``misdemeanor crime of domestic violence'' 
and terminology used in the statutory definition that was undefined 
such as ``a person who is cohabiting with or has cohabited with the 
victim as a spouse''). As is the case with the GCA, ATF has provided 
regulatory definitions for terms in the NFA that Congress did not 
define, such as ``manual reloading,'' ``responsible person,'' ``single 
function of the trigger,'' ``automatically,'' and ``frame or 
receiver.'' See Miscellaneous Amendments, 26 FR 2407 (Mar. 22, 1961) 
(defining ``manual reloading''); Machineguns, Destructive Devices and 
Certain Other Firearms; Background Checks for Responsible Persons of a 
Trust or Legal Entity With Respect To Making or Transferring a Firearm, 
81 FR 2658 (Jan. 15, 2016) (adding the definition for the term 
``responsible person''); Bump-Stock-Type Devices, 83 FR 66514 (Dec. 26, 
2018) (defining the terms ``single function of the trigger'' and 
``automatically''); Definition of ``Frame or Receiver'' and 
Identification of Firearms, 87 FR 24652 (Apr. 26, 2022) (revising and 
clarifying the definition of ``frame or receiver''). These definitions 
were necessary to implement the statutes.
    This rule is similar to these other examples, and, contrary to 
commenters' suggestions, it is not creating a new law; instead, it 
simply clarifies the definition of ``rifle'' under 27 CFR 478.11 and 
479.11, as necessary to implement existing law--i.e., the NFA and GCA. 
Although Congress defined the term ``rifle'' in the NFA, see 26 U.S.C. 
5845, Congress did not further define the key phrase from that 
definition: ``designed or redesigned, made or remade, and intended to 
be fired from the shoulder.'' Given the wide variety of configurations 
of weapons and ``stabilizing braces,'' this rule is ``necessary'' or 
``needful'' to clarify the meaning of this phrase. See 18 U.S.C. 926; 
26 U.S.C. 7805(a). This rule supplies that necessary clarity by 
providing the objective design features and other factors that ATF will 
use to discern whether a firearm is designed, made, and intended to be 
shoulder fired, and this rule represents the Department's best 
interpretation of the relevant statutory language.
    If a pistol with an attached ``stabilizing brace'' is found to be a 
``rifle,'' then such firearm could also be considered a ``short-
barreled rifle'' under the NFA and GCA, depending on the overall length 
of the weapon or length of the attached barrel, thus subjecting it to 
additional requirements as an NFA weapon. 26 U.S.C. 5845(a)(3)-(4); 18 
U.S.C. 921(a)(8); cf. Thompson/Center Arms Co., 504 U.S. at 513 n.6 
(``The inclusion of the rifle stock in the package brings the Contender 
[pistol] and carbine kit within the `intended to be fired from the 
shoulder' language contained in the definition of rifle in the statute. 
See 26 U.S.C. 5845(c). The only question is whether this combination of 
parts constitutes a short-barreled rifle.'').\78\ A firearm does not 
evade classification as an NFA weapon simply because it is configured 
with a compatible attachment, such as a ``stabilizing brace,'' that may 
serve a function other than as a shoulder stock to effectuate shoulder 
fire. As described in section II.B of this preamble, ATF recognized at 
the end of 2018 that it was necessary to evaluate the actual firearm at 
issue with the ``brace'' device attached.\79\
---------------------------------------------------------------------------

    \78\ The Supreme Court in Thompson/Center concluded that the 
``mere possibility'' that a pistol and accompanying kit might be 
``use[d] to assemble a regulated firearm'' did not establish that 
the ``combined packaging'' of the kit and pistol brought the package 
within the scope of ``making'' a short-barreled rifle. 504 U.S. at 
513. The Department is not adopting such an approach. This rule does 
not require regulation of a pistol based on the ``mere possibility'' 
that a ``stabilizing brace'' may be attached and the resulting 
firearm fired from the shoulder. Rather, the rule requires a 
consideration of objective design features and other factors to 
determine whether the ``braced'' weapon is designed, made, and 
intended to be fired from the shoulder.
    \79\ See supra note 57 and accompanying discussion. 
Additionally, on April 26, 2022, the Department published the final 
rule titled ``Definition of `Frame or Receiver' and Identification 
of Firearms,'' in which ATF codified in its regulations at 27 CFR 
478.92(c) instructions to the public that any requests for a 
determination on how an items affects the classification of a 
firearm under the GCA or NFA must include the firearm sample with 
all accessories and attachments relevant to the classification. 87 
FR at 24743. Prior to the publication of that final rule, FATD had 
been conveying this information through the classification process.
---------------------------------------------------------------------------

    This rule makes clear that the configuration of a pistol with an 
attached ``stabilizing brace'' can possess objective design features 
that, along with the direct or indirect marketing materials from the 
manufacturer or other information showing likely use by the general 
community, demonstrate the firearm is configured to be fired from the 
shoulder, making it a ``rifle.'' Section IV.B.3 of this preamble 
discusses further the factors necessary to determine when a weapon is a 
rifle as defined by the NFA and GCA. By incorporating the objective 
design features and other factors into the amended regulatory 
definition of ``rifle,'' the Department is implementing the statutory 
definition of ``rifle'' so the industry and public receive notice and 
may avoid potential legal hazards when installing a ``brace'' or other 
device on a firearm. Contrary to commenters'

[[Page 6501]]

assertions, the Department is not regulating the manufacture, sale, or 
possession of ``stabilizing braces'' themselves--that is, ``stabilizing 
braces'' when not attached to or associated with particular weapons. 
Accordingly, the rule does not create any new law; instead it simply 
implements the relevant statutes based on the Department's best 
interpretation of those statutes.
b. Lack of Authority Regarding Tax Collection
Comments Received
    One commenter argued that ATF ``is claiming authority to reclassify 
[pistols] that it doesn't have.'' (Emphasis omitted). In particular, 
the commenter asserted that the proposed rule violates 26 U.S.C. 4181-
4182, 5811, which impose a 10 percent tax on pistols and a $200 tax on 
short-barreled rifles, all monies that have already been collected. 
Because ATF is not ``grandfather[ing]' current pistols,'' the commenter 
asserted that ``ATF would have to undo that tax, because something 
cannot be a Pistol and [a short-barreled rifle].'' The commenter argued 
that ATF would have to go back a decade to collect taxes due on short-
barreled rifles and that the agency ``has no authority to undo that 
tax'' because, according to the commenter, only Congress can change the 
tax code and only for that calendar year. (Emphasis omitted).
Department Response
    The Department disagrees with the commenter who argued that the 
proposed rule violates 26 U.S.C. 4181-4182, 5811, which impose excise 
and making taxes on pistols and short-barreled rifles. As discussed 
above, the Attorney General delegated the administration and 
enforcement of the NFA to the Director of ATF. The Internal Revenue 
Code (``IRC''), 26 U.S.C. 6201, provides the Secretary of the Treasury 
with the legal authority to determine and assess the amount of taxes 
owed by a taxpayer. Section 7801(a)(2)(A) of the IRC grants this same 
authority to the Attorney General with respect to enforcing the 
provisions of the NFA (i.e., chapter 53 of title 26). This section 
states in relevant part that ``[t]he administration and enforcement of 
[as relevant here, chapter 53 of title 26] shall be performed by or 
under the supervision of the Attorney General; and the term `Secretary' 
or `Secretary of the Treasury' shall, when applied to those provisions 
mean the Attorney General.'' Therefore, ATF has authority consistent 
with the IRC to classify firearms and assess the appropriate tax 
liability of the manufacture, making, or transfer of the item under the 
NFA.
    The Department also disagrees with the commenter's argument that 
the Department is ``chang[ing]'' the tax code. The Department 
acknowledges that firearms equipped with ``stabilizing brace'' devices 
that are designed or redesigned, made or remade, and intended to be 
fired from shoulder, i.e., ``rifles'', or ``firearms (other than 
pistols or revolvers)'' incur an 11 percent excise tax, and that 
pistols and revolvers incur a 10 percent excise tax when the firearm is 
sold by a large manufacturer \80\ to a purchaser. 26 U.S.C. 4181, 4182; 
27 CFR 53.2. Manufacturers who sold 50 or more such rifles in a 
calendar year and did not pay tax under 26 U.S.C. 5811 (the NFA 
transfer tax) may be required to pay that excise tax in accordance with 
Federal regulations under Chapter 32 of the IRC. However, any 
determination that a particular weapon is a ``rifle'' within the 
meaning of the tax code does not change the tax code itself. It simply 
classifies an item for purposes of the tax code. Moreover, the 
Department notes that excise taxes are administered and collected by 
the Alcohol and Tobacco Tax and Trade Bureau, which is a part of the 
Department of the Treasury.
---------------------------------------------------------------------------

    \80\ For purposes of excise tax, the term ``Manufacturer,'' as 
defined in 27 CFR 53.11, includes any person who produces a taxable 
article from junk material or from new or raw material by 
processing, manipulating, or changing the form of an article or by 
combining or assembling two or more articles. The term also includes 
a ``producer'' and an ``importer.'' The person for whom the taxable 
article is manufactured or produced, and not the person who actually 
manufactures or produces it, will be considered the manufacturer 
where a person manufactures or produces a taxable article for 
another person who furnishes materials under an agreement whereby 
the person who furnished the materials retains title thereto and to 
the finished article.
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c. Administrative Procedure Act (``APA'')
i. APA--Change in ATF Position
Comments Received
    Numerous commenters asserted that the proposed rule is another 
``flip flop'' by the agency and arbitrary and capricious in violation 
of the APA. Commenters said that ATF has long held the position that 
the NFA does not apply to pistols equipped with ``stabilizing braces,'' 
even if the ``braces'' are used to secure the weapons to the shoulder. 
Numerous commenters outlined the history and positions ATF has taken 
with respect to pistols with attached ``stabilizing braces,'' claiming 
that ATF has been very inconsistent in its approach. For example, one 
commenter questioned why ATF first officially recognized that a 
``stabilizing braces'' configured on an AR-15 style pistol did not 
create a ``rifle,'' but then, starting in 2012, provided 10 letters 
going back and forth on whether a ``stabilize brace'' attached to a 
firearm did create a ``rifle.'' Specifically, multiple commenters noted 
that, in 2020, ATF said that ``stabilizing braces'' do not turn an AR-
pistol into a short-barreled rifle. Commenters stated that now, after 
numerous years, ATF's proposed rule would make all previously produced 
combinations of ``braces'' and firearms rifles rather than pistols.
    Another commenter believed that ATF arbitrarily changed its 
interpretation because it stated in the NPRM that ``stabilizing 
braces'' are marketed ``to support single-handed firing.'' 86 FR at 
30827. Because of this statement in the NPRM, the same commenter 
remarked that ``ATF apparently believes that a stabilizing brace can 
never be used on a `firearm' that is designed to be operated by two 
hands.'' (Emphasis in the original.) The commenter argued that a 
``stabilizing brace'' can be used to support two-handed, non-shouldered 
fire.
Department Response
    The Department acknowledges that the variations of ``stabilizing 
brace'' designs, the manufacturer's purported intent for ``brace'' 
devices, the changes in ATF's classification process, and the 
inconsistencies in ATF's analysis of ``braces'' attached to firearms 
may have led to confusion regarding the application of the NFA and GCA 
to firearms equipped with a purported ``stabilizing brace.''
    The Department agrees with commenters, including SB Tactical, that 
the analyses in some of ATF's prior opinions regarding incidental 
firing from the shoulder and the use of ``stabilizing brace'' devices 
on firearms have been inconsistent. Furthermore, as discussed below, 
ATF acknowledges that its classifications issued between 2012 and 2020 
did not properly or consistently evaluate whether firearms equipped 
with those devices were ``rifles'' as defined in the NFA and GCA. 
Specifically, ATF's analysis placed improper weight on whether the 
``stabilizing brace'' at issue could be used as a ``brace'' to support 
single-handed fire rather than whether the overall configuration of the 
firearm with

[[Page 6502]]

the attached ``brace'' is designed and intended to be fired from the 
shoulder, as required by the statutory definition of the term 
``rifle.''
    Nevertheless, the Department disagrees that any prior 
inconsistencies or changes by ATF make this rule arbitrary and 
capricious under the APA. Despite inconsistencies in ATF's prior 
classifications, each classification letter referenced ATF's practice 
of considering the physical design characteristics or features when 
looking at a ``stabilizing brace'' device on a firearm.\81\ The 
Department acknowledges that this rule is a change in position from 
some of ATF's previous classifications or positions, but the intent of 
this rule is to resolve prior inconsistencies and ensure consistent 
application of the statutory definition of ``rifle'' to firearms 
equipped with ``stabilizing braces'' or other rearward attachments. As 
discussed below, the prevalent shouldering of these firearms further 
demonstrates that a majority of firearms equipped with ``stabilizing 
braces,'' currently or previously available on the market, incorporate 
rifle characteristics. Therefore, it is necessary for the Department to 
issue this rule to clarify the statutory definition of ``rifle'' and to 
inform the public of the best interpretation of the definition, which 
will guide the proper legal and factual analysis to be conducted in 
evaluating whether a firearm is designed, made, and intended to be 
fired from the shoulder. As a result, and to ensure consistency moving 
forward, ATF's prior classifications pertaining to ``stabilizing 
brace'' devices, or firearms equipped with a ``stabilizing brace,'' are 
no longer valid or authoritative as of May 31, 2023.\82\
---------------------------------------------------------------------------

    \81\ For example, a 2014 letter provided that ``FTB classifies 
weapons based on their physical design characteristics.'' Letter 
from ATF #301737 (Mar. 5, 2014). In the 2015 Open Letter, ATF noted 
that it had previously looked at the objective design features in 
classifying a ``stabilizing brace,'' even as it also considered the 
manufacturer's or makers' stated intent. Similarly, in a 2017 letter 
to counsel for SB Tactical, ATF clarified that if a shooter takes 
``affirmative steps to configure the device for use as a shoulder 
stock--for example, configuring the brace so as to permanently affix 
it to the end of a buffer tube, (thereby creating a length that has 
no other purpose than to facilitate its use as a stock), removing 
the arm-strap, or otherwise undermining its ability to be used as a 
brace--and then in fact shoots the firearm from the shoulder using 
the accessory as a shoulder stock, that person has objectively 
`redesigned' the firearm for purposes of the NFA.'' Letter from ATF 
#30736 (Oct 31, 2017).
    \82\ The Department has similarly announced in a different final 
rule that certain classifications of frames or receivers were no 
longer authoritative. See 87 FR at 24741.
---------------------------------------------------------------------------

    When an agency changes course, the agency must ``provide [a] 
reasoned explanation for its action.'' F.C.C. v. Fox Television 
Stations, Inc., 556 U.S. 502, 515 (2009). The agency, however, has no 
heightened burden in prescribing regulations that displace inconsistent 
previous regulatory actions. Id. at 514-15. Federal courts recognize 
that it is within ATF's discretion to reclassify and rectify a firearms 
classification error provided the agency's interpretation is consistent 
with the statute and legislative history. Akins v. United States, 312 
Fed. App'x 197, 200 (11th Cir. 2009) (holding the reclassification of 
the Akins Accelerator as a machinegun was not arbitrary and 
capricious).\83\ Accordingly, the Department recognizes it is within 
ATF's authority to replace its prior inconsistent legal 
classifications, provided the change is reasonably explained and the 
new position is permissible under the statute.
---------------------------------------------------------------------------

    \83\ See also Guedes v. Bureau of Alcohol, Tobacco, Firearms, 
and Explosives, 356 F. Supp. 3d 109, 127 (D.D.C. 2019), judgment 
entered, 762 F. App'x 7 (D.C. Cir. 2019) (``So long as any change is 
reasonably explained, it is not arbitrary and capricious for an 
agency to change its mind in light of experience, or in the face of 
new or additional evidence, or further analysis or other factors 
indicating [an] earlier decision should be altered or abandoned.'' 
(alteration omitted) (quoting New England Power Generators Ass'n v. 
FERC, 879 F.3d 1192, 1201 (D.C. Cir. 2018))); Aposhian v. Barr, 374 
F. Supp. 3d 1145, 1153 (D. Utah 2019) (concluding that ATF's change 
in policy with regard to bump stocks was permissible under the 
statute and was supported by good reasons when ATF explained that 
prior position was not based on substantial or consistent legal and 
where new interpretation was both permissible and best 
interpretation of the statute), aff'd, 958 F.3d 969 (10th Cir. 
2020), reh'g en banc granted, judgment vacated, 973 F.3d 1151 (10th 
Cir. 2020), vacated sub nom. Aposhian v. Wilkinson, 989 F.3d 890 
(10th Cir. 2021), and opinion reinstated sub nom. Aposhian v. 
Wilkinson, 989 F.3d 890 (10th Cir. 2021).
---------------------------------------------------------------------------

    From 2012 to 2018, ATF issued several classifications of 
``stabilizing braces'' concluding that the ``brace'' did not redesign a 
firearm to be fired from the shoulder.\84\ These pre-2018 
classifications looked at whether the ``stabilizing brace'' brought a 
firearm within the purview of the NFA in part by placing improper 
weight on the manufacturer's stated intent to install the ``brace'' on 
heavy pistols (e.g., AR-type, AK-type, CZ Scorpion) to stabilize the 
arm to support single-handed fire, rather than whether objective design 
features and other evidence, as listed in this rule, indicated that the 
firearm equipped with the ``brace'' had been designed and intended to 
be fired from the shoulder. ATF's classification letters after 2018, 
while appropriately focusing on objective design features, continued to 
place improper weight on whether the ``stabilizing brace'' at issue 
could be used as a ``brace'' to support single-handed fire, even if the 
overall configuration of the firearm equipped with the ``brace'' 
indicated the weapon was designed or redesigned, made or remade, and 
intended to be fired from the shoulder. In other words, ATF now 
concludes that it incorrectly reviewed and classified the weapons with 
purported ``stabilizing braces'' in those classifications, with an 
inappropriate reliance on the manufacturer's assertions that a 
``stabilizing brace'' was intended to assist with single-handed firing 
without regard to whether the objective features of the firearm 
indicate that it is designed and intended to be fired from the 
shoulder.\85\ This resulted in inconsistencies in ATF classifications 
and an incorrect public perception that a firearm equipped with a 
``stabilizing brace'' never falls within the purview of the NFA, 
regardless of the objective design features of the firearm. The 
Department accordingly clarifies for the public and the firearms 
industry that the term ``designed or redesigned, made or remade, and 
intended to be fired from the shoulder'' includes a weapon that is 
equipped with an accessory, component, or other rearward attachment 
(e.g., a ``stabilizing brace'') that provides surface area that allows 
the weapon to be fired from the shoulder, provided that other factors, 
as listed in the final regulatory text, also indicate that the weapon 
with such surface area is designed, made, and intended to be fired from 
the shoulder.
---------------------------------------------------------------------------

    \84\ ATF classified the following brace devices prior to August 
2018:
    SB Tactical SB15 (marketed by SIG)
    SB Tactical PSB Brace
    Shockwave Blade Version 1
    Shockwave Blade Version 2
    Shockwave Blade with KAK Tube
    Gear Head Works Tailhook Version 1
    Gear Head Works Tail Hook Version 2
    Safe Pistol Arm Brace
    Strike Industries Stabilizer
    Three Versions of Strike Industries Stabilizers
    Strike Industries Stabilizer/Blade
    Trinity Force AR Pistol Stabilizer
    Bicep Brace Version 3
    Accu Pistol Brace Version 2
    Forearm BraceBP15 ``AR15-type'' Pistol Stabilizing Brace Version 
2
    Minimal Arm Brace
    Buffer Tube Adaptor for AK w/SB15
    Additionally, in 2020 ATF classified a Ruger 556 pistol with a 
SB Tactical SBL Mini ``stabilizing brace attached as a pistol and 
not a rifle.
    \85\ See supra note 26.
---------------------------------------------------------------------------

    The Department also acknowledges the commenters' concerns that ATF 
changed its interpretation when it indicated in the NPRM that ``a 
stabilizing brace can be used only to support single-handed firing.'' 
Indeed, the Department agrees that the ability to fire with a single 
hand is not in part of the GCA or NFA definition of ``rifle.'' Hence, 
in prior classifications, ATF

[[Page 6503]]

erroneously concluded that the incorporation of a ``stabilizing brace'' 
that allowed single-handed firing, as stated by the manufacturer, 
precludes the firearm from being designed, made, and intended to be 
fired from the shoulder. This interpretation by ATF incorrectly read 
into the GCA and NFA a requirement that, for a firearm to be a rifle, 
it must exclusively be designed, made, and intended to be fired from 
the shoulder; in other words, ATF did not recognize that a firearm 
equipped with an accessory or rearward attachment like a ``stabilizing 
brace'' may be a rifle, regardless of whether the firearm includes a 
feature that might permit an alternate use of one-handed firing. It is 
similarly incorrect to focus on whether a ``stabilizing brace'' can be 
used, in some circumstances, to support two-handed, non-shouldered 
fire.
    Indeed, courts have likewise held that a firearm does not need to 
be designed and intended exclusively to be fired from the shoulder to 
constitute a short-barreled rifle under the law. See United States v. 
Rose, 695 F.2d 1356, 1358 (10th Cir. 1982) (holding that a firearm with 
a collapsible stock is a short-barreled rifle and rejecting the 
defendant's claim that the weapon must have been designed or redesigned 
to fire exclusively from the shoulder). The Tenth Circuit stated that, 
``[a]lthough the Uzi could be fired from several positions, testimony 
indicated that the Uzi is an effective shoulder weapon,'' and the Uzi's 
``collapsible stock[ ] permitted [it] to be fired from the shoulder.'' 
Id. The Uzi was accordingly ``redesigned or intended to be used as a 
rifle within the meaning of '' the statutory definition. Id. Similarly, 
in a case involving a firearm with a 14-1/2 inch barrel that could be 
fired with one hand or from the shoulder, a defendant argued that, 
because the firearm lacked any sights and because it was not 
necessarily advantageous to fire the weapon from the shoulder, the 
firearm should not be regulated as a ``rifle'' under the NFA. Sipes v. 
United States, 321 F.2d 174, 178-79 (8th Cir. 1963), overruled on other 
grounds.\86\ The Eighth Circuit concluded the weapon was still a rifle. 
Id. ``That it had no sights or that it could be fired elsewhere than 
from the shoulder makes it no less a rifle within the statutory 
definition.'' Id. at 178. This reasoning is plainly applicable here. A 
``stabilizing brace'' device cannot remove a firearm from the 
definition of a rifle solely because the purported purpose or effect of 
the device is to facilitate one-handed firing, even if the device does 
allow one-handed firing as a possible alternative means of using the 
weapon.
---------------------------------------------------------------------------

    \86\ Specifically, Haynes v. United States rejected the 
government's argument which cited Sipes for the proposition that two 
separate offenses occur for failure to register a firearm and 
subsequent possession of the firearm under 26 U.S.C. 5841 and 5851. 
390 U.S. 85, 91 n.7 (1968).
---------------------------------------------------------------------------

    Due to the past inconsistences and misapplication of the statutory 
definition as pointed out by commenters, the Department is within its 
statutory authority and under an obligation to reconsider and rectify 
its past classifications. Moreover, the fact that many of these 
``stabilizing brace'' devices are designed and intended to be the 
equivalent of a shoulder stock, or that firearms equipped with 
``stabilizing brace'' devices are in fact designed and intended to be 
fired from the shoulder, is abundantly evident in publications and 
consumer and marketing material issued by firearms manufacturers. For 
instance, ATF identified multiple online articles after its evaluation 
of SB Tactical's SB15 that cited the SB15 ``brace'' as a method to 
circumvent the NFA, in that the ``brace'' functions well as a shoulder 
stock. The articles also included pictures of individuals shooting 
firearms, equipped with the SB15, from the shoulder.\87\ ATF identified 
one article posted on SB Tactical's website, dated December 23, 2014, 
which discussed an award for SB Tactical's CEO as the most influential 
personality of the year for inventing the SB15. The article states: 
``It's no secret that Bosco's brace can also be used as a shoulder 
stock by people with two good arms. With Bosco's brace, all Americans 
are able to modify an AR-15-style pistol into what's effectively [a 
short-barreled rifle]--without additional ATF infringement on their gun 
rights.'' \88\
---------------------------------------------------------------------------

    \87\ Alex C. Gun Review: Sig SB15 Pistol Stabilizing Brace 
Review, The Firearm Blog (Aug. 18, 2013), <a href="https://www.thefirearmblog.com/blog/2013/08/18/sig-sb15-pistol-stabilizing-brace-review/">https://www.thefirearmblog.com/blog/2013/08/18/sig-sb15-pistol-stabilizing-brace-review/</a> (``If you are like me, you remember seeing the Sig 
SB15 a while back and thinking `hey they hacked the NFA'. Of course 
we all know how it is supposed to be used, but let us get real and 
look at this objectively: Sig made an `arm brace' and got ATF 
approval for said arm brace. The arm brace slides over a pistol 
buffer and looks like a stock . . . but it is an arm brace.''); Ryan 
Cross, Sig Sauer SB15 Pistol Stabilizing Brace, Firearms Insider 
Community (Sept. 14, 2014), <a href="http://www.firearmsinsider.tv/gun-gear-reviews/category/Sig+Sauer">http://www.firearmsinsider.tv/gun-gear-reviews/category/Sig+Sauer</a> (``So basically if you have an AR Pistol 
and you install this arm brace, it lets you legally own something 
that is similar to an SBR in handling/shouldering terms, without 
filling a Form 4, paying for a tax stamp, and waiting between 8-12 
months for your stamp and approved paperwork, AND not being able to 
transport the firearm between states without notification of [law 
enforcement officers].''); Dave Higginbotham, Sig Sauer P556, Short 
Barrel Rifle Performance from a Pistol--New Gun Review, Gun America 
Digest (May 30, 2014), <a href="https://www.gunsamerica.com/digest/sig-sauer-p556-short-barrel-rifle-performance-pistol-new-gun-review-2/">https://www.gunsamerica.com/digest/sig-sauer-p556-short-barrel-rifle-performance-pistol-new-gun-review-2/</a>.
    \88\ Nick Leghorn, TTAG 2014 Editor's Choice Award--Most 
Influential Personality of the Year: Alex Bosco, SB Tactical (Dec. 
22, 2014), <a href="https://web.archive.org/web/20150206045745/http://www.sb-tactical.com/ttag-2014-personality-of-the-year-alex-bosco/">https://web.archive.org/web/20150206045745/http://www.sb-tactical.com/ttag-2014-personality-of-the-year-alex-bosco/</a> (emphasis 
in the original).
---------------------------------------------------------------------------

    SB Tactical has posted articles that explained how short-barreled 
rifle performance could be obtained from a pistol equipped with a 
``stabilizing brace.'' \89\ In 2016, SB Tactical also presented a 
YouTube video advertisement describing shooting techniques for a pistol 
attached with their ``brace'' device.\90\ As shown below, the video 
included demonstrations of multiple ``stabilizing brace'' models that 
ATF had not evaluated.
---------------------------------------------------------------------------

    \89\ David Higginbotham, SIG SAUER P556, SHORT BARREL RIFLE 
PERFORMANCE FROM A PISTOL, SB Tactical (Jun. 16, 2014), <a href="https://web.archive.org/web/20150307044415/http://www.sb-tactical.com/sig-sauer-p556-short-barrel-rifle-performance-from-a-pistol-2">https://web.archive.org/web/20150307044415/http://www.sb-tactical.com/sig-sauer-p556-short-barrel-rifle-performance-from-a-pistol-2</a>; David M 
Fortier, Shotgun News July 20th 2014--Always wanted a Short Barrel 
Rifle but won't jump through the hoops? Here's your solution, SB 
Tactical (July 22, 2014), <a href="https://web.archive.org/web/20150306211245/http://www.sb-tactical.com/shotgun-news-july-20th-2014">https://web.archive.org/web/20150306211245/http://www.sb-tactical.com/shotgun-news-july-20th-2014</a>.
    \90\ SB Tactical, Pistol Stabilizing Brace Shooting Techniques, 
YouTube (July 29, 2016), <a href="https://www.youtube.com/watch?v=FoTHRWsCz64">https://www.youtube.com/watch?v=FoTHRWsCz64</a>.
---------------------------------------------------------------------------

BILLING CODE 4410-FY-P

[[Page 6504]]

[GRAPHIC] [TIFF OMITTED] TR31JA23.032


[[Page 6505]]


[GRAPHIC] [TIFF OMITTED] TR31JA23.033

BILLING CODE 4410-FY-C
    In demonstrating these various firing techniques of a firearm 
equipped with its ``stabilizing brace'' models, the manufacturer's 
video clearly shows it informed the public about and marketed its 
``brace'' devices for uses that go far beyond the original design and 
intent of the ``brace'' as explained to ATF with the sample it 
submitted for evaluation. Further, the online marketing material 
showcasing these various shooting techniques highlight key objective 
design features, as described in this rule, that are consistent with a 
rifle that is designed, made, and intended to be fired from the 
shoulder. Even though the ``brace'' manufacturer notably did not 
include footage of a firearm with its ``stabilizing brace'' being fired 
from the shoulder, the video clearly demonstrates shooting of firearms 
equipped with its ``stabilizing braces'' from the sternum. This firing 
technique involves the shooter pressing the rear surface area against 
the shooter's body (on the sternum near the shoulder) to operate the 
firearm. Were the shooter to merely shift the firearm a few inches, the 
rear surface area provided by the ``stabilizing brace'' would 
effectively allow for firing from the shoulder. This technique 
indicates to the general community the ease and practicality of 
shouldering firearms equipped with ``stabilizing braces.'' Similarly, 
the video also demonstrates shooters using a ``cheek welding'' firing 
technique where the objective design features of a rifle are also 
evident. Based on the rear surface area provided by the ``stabilizing 
brace'' and the alignment of the sights, as seen in the video, the 
shooter can easily shoulder fire the weapon.
    Further, at least one firearms manufacturer advertised the SB47, a 
later version of the SB15 ``brace,'' as a shoulder stock and stated 
that no short-barreled rifle NFA tax stamp
is required.\91\ SB Tactical also posted an advertisement that the SB47 
is ``ATF approved for everybody[;] the SB47 does not require any 
special permits doctors [sic] notes or SBR tax stamp!'' \92\ Notably, 
the SB47 was not the same design as the original brace. The SB47 design 
was to be attached to an AK-type pistol rather than an AR-type pistol. 
SB Tactical posted a review of the SB47 where the reviewer generally 
stated that his first impression was that a firearm equipped with a 
SB47 is a short-barreled rifle, even though he stated that the reason 
for creating the SB15 and SB47 was to assist disabled veterans.\93\
---------------------------------------------------------------------------

    \91\ Century International Arms Inc., SB47 Stabilizing Brace 
(Sept. 6, 2013), <a href="https://web.archive.org/web/20130906231317/http://centuryarms.biz/proddetail.asp?prod=OT1648">https://web.archive.org/web/20130906231317/http://centuryarms.biz/proddetail.asp?prod=OT1648</a>.
    \92\ SB Tactical, SB47 (Mar. 17, 2015), <a href="https://web.archive.org/web/20150317032957/">https://web.archive.org/web/20150317032957/</a> <a href="http://www.sb-tactical.com/products/sb47/">http://www.sb-tactical.com/products/sb47/</a>.
    \93\ SB Tactical, Gear Review: SB Tactical SB-47 Stabilizing 
Brace (Mar. 15, 2014), <a href="https://web.archive.org/web/20150307044345/">https://web.archive.org/web/20150307044345/</a> 
<a href="http://www.sb-tactical.com/gear-review-sb-tactical-sb-47-stabilizing-brace-3">http://www.sb-tactical.com/gear-review-sb-tactical-sb-47-stabilizing-brace-3</a> (``I had seen this piece of equipment online and 
immediately thought it was an SBR work-around.''); id. (stating that 
the original ``brace'' device ``was designed to allow a veteran who 
lost the ability to do the things he loved, recapture that joy,'' 
but acknowledging the ``brace'' device is ``being misused as a[n] 
SBR stock'').

---------------------------------------------------------------------------

[[Page 6506]]

    Numerous videos also demonstrate individuals using the SB15 and 
SB47 ``stabilizing brace'' from the shoulder.\94\ Notably, some of 
these videos referenced a 2014 ATF letter in which FATD stated that 
using ``braces'' improperly (i.e., shouldering them) would not 
constitute a design change.\95\ In at least one video, an individual 
generally stated that it was lawful to shoulder the firearm and he knew 
what the ``stabilizing brace'' was for, i.e., shouldering, but had not 
said it publicly until now because he did not want to be ``that guy'' 
prior to the 2014 letter.\96\ These online materials demonstrate a 
general recognition by the firearms industry and certain firearms 
owners that a firearm equipped with an SB15 or SB47 ``brace'' included 
objective design features that indicated the firearm is a rifle 
designed and intended to be fired from the shoulder, even though such 
weapons had not been manufactured or transferred in accordance with the 
requirements of the NFA (depending on the barrel length). Numerous 
other online materials for ``stabilizing braces,'' including for 
Shockwave Blade, Strike Industries, and Gear Head Works Tailhook, 
display individuals using firearms marketed as pistols but shouldered 
as short-barreled rifles.\97\ Additionally, other publications and 
online videos are available regarding the use of various ``braces'' to 
fire from the shoulder, further demonstrating that firearms equipped 
with these ``braces'' were and are being used extensively as short-
barreled rifles.\98\
---------------------------------------------------------------------------

    \94\ Tactiholics, ATF Compliant Sig SB15 Stabilizing Brace: Get 
One!--Tacitoholics<SUP>TM</SUP>, YouTube (Nov. 19, 2014), <a href="https://www.youtube.com/watch?v=rPalYGJhwbc">https://www.youtube.com/watch?v=rPalYGJhwbc</a>; BigDaddyHoffman1911, AK 47 
Pistol with SB-47 Brace, YouTube (July 27, 2014), <a href="https://www.youtube.com/watch?v=zx-5IiM7iw0">https://www.youtube.com/watch?v=zx-5IiM7iw0</a>; The Late Boy Scout, The Awesome 
M85 AK Pistol with SB-47 Stabilizing Brace, YouTube (Sept. 29, 
2014), <a href="https://www.youtube.com/watch?v=CKE2ELSJtak">https://www.youtube.com/watch?v=CKE2ELSJtak</a>; Jordan Winkler, 
Century Arms C39V2 AK Pistol w/SB Tactical Brace Review, YouTube 
(May 10, 2017), <a href="https://www.youtube.com/watch?v=l0w8sp43t8M">https://www.youtube.com/watch?v=l0w8sp43t8M</a>.
    \95\ In the letter, FATD advised that it does not classify 
weapons based on how an individual uses a weapon and that firing the 
pistol from the shoulder did not reclassify it as a short-barreled 
rifle. FATD further mentioned that some ``brace'' designs, such as 
the Sig Stability Brace, had not been classified as a shoulder stock 
and that therefore, using those ``braces'' improperly would not 
constitute a design change or change the classification of the 
weapon. Letter from ATF #301737 (Mar. 5, 2014).
    \96\ Military Arms Channel, Shouldering a Handgun with a Sig 
SB15 Brace, Military Arms Channel (Apr. 7, 2014), <a href="https://www.youtube.com/watch?v=qNMLO18kl98">https://www.youtube.com/watch?v=qNMLO18kl98</a>.
    \97\ Foghorn, Gear Review: Shockwave Technologies Blade Pistol 
Stabilizer, The Truth About Guns (Oct. 9, 2015), <a href="https://www.thetruthaboutguns.com/gear-review-shockwave-technologies-blade-pistol-stabilizer/">https://www.thetruthaboutguns.com/gear-review-shockwave-technologies-blade-pistol-stabilizer/</a>; Brandon Harville, 7 Best AR-15 & AK Pistol 
Braces [Hands-On & Video], PewPew Tactical (June 2, 2021), <a href="https://www.pewpewtactical.com/best-ar-pistol-braces/">https://www.pewpewtactical.com/best-ar-pistol-braces/</a> (``It might look and 
function like a rifle, but thanks to the fact that AR-15 pistols 
don't come built with a stock, they're legally classified as 
pistols--giving them a full pardon from inconvenient NFA 
restrictions.'' (emphasis omitted)); FocusTripp, Best AR-15 Pistol 
Brace Under $40--Foxtrox Mike VS KAK Shockwave Blade VS Trinity 
Force, YouTube (June 15, 2019), <a href="https://www.youtube.com/watch?v=IJQG4liOlRk">https://www.youtube.com/watch?v=IJQG4liOlRk</a>; Hoplopfheil, Shockwave Blade Brace 1.0 vs 2.0 
Comparison, YouTube (Jan. 27, 2020), <a href="https://www.youtube.com/watch?v=W5-C6efbN_s">https://www.youtube.com/watch?v=W5-C6efbN_s</a>; Tactical Hyve, Navy SEAL ``Coch'' Talks About 
His AR Pistol Setup, YouTube (Sept. 16, 2020), <a href="https://www.youtube.com/watch?v=Zfjdavuh3vc">https://www.youtube.com/watch?v=Zfjdavuh3vc</a>; AtlanticFirearms, Draco AK47 
Pistol with Brace at Atlantic Firearms, YouTube (Aug. 9, 2019), 
<a href="https://www.youtube.com/watch?v=JzxTs1-MwKI">https://www.youtube.com/watch?v=JzxTs1-MwKI</a>; KB32 Tactical, AR15 
Pistol 10.5 Inch 100 Yard Test!! How'd She Do????, YouTube (May 20, 
2017), <a href="https://www.youtube.com/watch?v=Pab-p6JcwL0">https://www.youtube.com/watch?v=Pab-p6JcwL0</a>; 704 Tactical, 
Strike Industries AR Pistol Stabilizer Brace, YouTube (Jun. 4, 
2020), <a href="https://www.youtube.com/watch?v=Slf_IBxIzLg">https://www.youtube.com/watch?v=Slf_IBxIzLg</a>; WorkTheTrigger, 
Strike Industries Pistol Stabilizing Brace, YouTube (May 19, 2020), 
<a href="https://www.youtube.com/watch?v=BbldU84PQZU">https://www.youtube.com/watch?v=BbldU84PQZU</a>; Jeremy S., Gear Review: 
Gear Head Works Tailhook Pistol Braces (New Release), The Truth 
About Guns (Dec. 31, 2016), <a href="https://www.thetruthaboutguns.com/gear-review-gear-head-works-tailhook-pistol-braces/">https://www.thetruthaboutguns.com/gear-review-gear-head-works-tailhook-pistol-braces/</a> (``From the rear, if 
you're thinking `gosh, that looks like it would be a great stock' 
you're darn right. As my CZ Scorpion Evo is a registered SBR I could 
legally shoulder the Tailhook and, I gotta say, the flat back and 
solid aluminum build make for as good of a shoulder stock as 
anything.''); sootch00, Gear Head Works Tail Hook AR Pistol Brace, 
YouTube (Mar. 16, 2017), <a href="https://www.youtube.com/watch?v=FWXXMwa-Xk8">https://www.youtube.com/watch?v=FWXXMwa-Xk8</a>; Military Arms Channel, B&T GHM9 9mm Pistol with Tailhook 
Brace!, YouTube (Jan. 9, 2018), <a href="https://www.youtube.com/watch?v=BnEk9PkMu84">https://www.youtube.com/watch?v=BnEk9PkMu84</a>.
    \98\ TFB TV, Testing the Upgraded FS1913 Folding Brace, YouTube 
(May 12, 2020), <a href="https://www.youtube.com/watch?v=-_VAJordA68">https://www.youtube.com/watch?v=-_VAJordA68</a> 
(individual testing a Ruger PC Charger with SBTactical FS1913 
folding brace); Pew Pew Tactical, Best AR-15 Pistol Braces: Truck 
Guns Ahoy!, YouTube (July 2, 2019), <a href="https://www.youtube.com/watch?v=uu2piCz8ThI">https://www.youtube.com/watch?v=uu2piCz8ThI</a> (stating that a firearm with a pistol brace is 
an alternative to building a short-barreled rifle and obtaining a 
tax stamp and reviewing the SB Mini, Shockwave Blade, SBM4, SBA4, 
SBA3, and the SBPDW while firing all the firearms from the 
shoulder); JPRifles, SBA3 Pistol Stabilizing Brace--New Product 
Showcase--FEBRUARY 2019, YouTube (Feb. 1, 2019), <a href="https://www.youtube.com/watch?v=4qaJpDzOyjQ">https://www.youtube.com/watch?v=4qaJpDzOyjQ</a> (reviewing the SBA3 stabilizing 
brace demonstrating fired from the shoulder only); Ballistic Staff, 
CZ Scorpion Micro Folder: CZ Finally Adds Folding Brace to Popular 
Pistol, Athlon Outdoors Network (Feb. 5, 2020), <a href="https://www.ballisticmag.com/cz-scorpion-micro-folder-pistol/">https://www.ballisticmag.com/cz-scorpion-micro-folder-pistol/</a> (reviewing 
folding brace on CZ Scorpion pistol); ClassicFirearms, You Can Have 
A Brace On A Glock?! (Recover 20/20 Brace), YouTube (July 28, 2021), 
<a href="https://www.youtube.com/watch?v=seBxysheK_4">https://www.youtube.com/watch?v=seBxysheK_4</a> (firing a Glock pistol 
with a ``stabilizing brace'' from the shoulder); Mrgunsngear 
Channel, SB Tactical SBPDW Review: Best Adjustable Brace For AR-15 
Pistols?, YouTube (Feb. 24, 2018), <a href="https://www.youtube.com/watch?v=c9ueVMFK-q0">https://www.youtube.com/watch?v=c9ueVMFK-q0</a> (demonstrating SBPDW being fired from the 
shoulder); ClassicFirearms, Manufacturer Review SB Tactical, YouTube 
(Feb. 14, 2022), <a href="https://www.youtube.com/watch?v=mC3M8T4lLSM">https://www.youtube.com/watch?v=mC3M8T4lLSM</a> 
(reviewing SBA3, SBA4, SBPDW brace while firing from the shoulder 
and citing prior ATF letter which approves incidental shouldering); 
Mrgunsngear Channel, SB Tactical SBA3 vs. SBA4: Which Is The Best 
AR-15 Pistol Brace?, YouTube (Dec. 5, 2019), <a href="https://www.youtube.com/watch?v=PWBHs2W8bxQ">https://www.youtube.com/watch?v=PWBHs2W8bxQ</a> (comparing the SBA3 and SBA4 
while firing from the shoulder); Fire Mountain Outdoors, SB Tactical 
PDW pistol brace overview YouTube (Jan. 23, 2018), <a href="https://www.youtube.com/watch?v=zPERkIXY2dM">https://www.youtube.com/watch?v=zPERkIXY2dM</a> (demonstrating the SBPDW as 
intended and shouldered); TheGunCollective, I SWEAR IT'S NOT A 
STOCK--FLUX Defense Glock Pistol Brace, YouTube (May 17, 2019), 
<a href="https://www.youtube.com/watch?v=4PL5fUYA_sg">https://www.youtube.com/watch?v=4PL5fUYA_sg</a> (firing a Glock with a 
``stabilizing brace'' from the shoulder).
---------------------------------------------------------------------------

    The firearms industry's and community's prevalent use of the 
firearms as rifles, as highlighted in these videos, underscores why the 
Department has concluded that the assessment of whether a firearm falls 
within the statutory definition of a ``rifle'' should incorporate the 
objective design features of the firearm. Also, the recognition by 
firearms manufacturers and owners that ``stabilizing brace'' devices 
circumvented the NFA strongly supports the Department's decision to re-
evaluate its analysis of firearms equipped with ``stabilizing braces.'' 
Accordingly, the Department has determined the best approach is not to 
focus solely on stated intent or on the possibility that weapons with a 
``brace'' might, in some circumstances, be fired with one hand. Rather, 
it is appropriate and necessary for the Department to clarify through 
this rulemaking the objective design features and other factors that 
indicate when a weapon that is equipped with an accessory, component, 
or other rearward attachment (e.g., a ``stabilizing brace'') is 
designed, made, and intended to be fired from the shoulder.
    Lastly, the Department notes that neither the rule nor the relevant 
statutes ban ``stabilizing braces'' or the use of ``stabilizing 
braces'' on pistols. Indeed, this rule does not impose any new legal 
obligations on owners of ``stabilizing braces'' at all, as any 
obligations for these owners result only from the NFA and the GCA. 
Instead, this rule merely conveys more clearly to the public the 
objective design features and other factors that indicate a weapon is 
in fact a firearm or short-barreled rifle under the relevant statues. 
Hence, an individual may continue to use such a device but may be 
subject to certain requirements depending on the firearm's objective 
design features and other factors, as explained in this final rule.

[[Page 6507]]

ii. APA--Private Classification Letters
Comments Received
    Commenters said ATF's position is not clear because of the varying 
interpretations and different responses that ATF had provided through 
private letter classifications. They also stated that this past 
inconsistency results in the agency undermining its own legitimacy when 
it makes ``a capricious and arbitrary change . . . after millions of 
Americans have legally purchased [`stabilizing braces'] with the 
understanding that ATF had approved them.'' Similarly, another 
commenter stated that it is difficult for the public to rely on ATF 
classifications for guidance because of the ``vast variations in 
submissions'' and the fact that ``if even the smallest detail is 
changed (such as adding different sights, or a different optic), the 
entire firearm's classification could be inadvertently changed.'' 
(Quotation marks and emphasis omitted.)
Department Response
    The Department does not agree with commenters that publishing this 
rule is arbitrary or capricious even if it results in prior 
classifications being no longer valid. As discussed above, ATF makes 
classifications based on the configuration of a particular firearm, as 
submitted to ATF, because attempting to make more general 
classifications may result in the erroneous application of the relevant 
statutes. There are many variations in firearms because of differences 
in weight, length, rear surface area, adjustability of a rearward 
attachment, length of pull, and sights or scopes, for example. Because 
private letter classifications are dependent on the specific 
configuration of the firearm, there may be different classifications 
for each unique firearm submitted, even if the weapons are outwardly 
similar. Moreover, some individuals and manufacturers were using ATF 
classification letters from a different device and applying that 
classification to a new device. This rule informs the public of the 
best interpretation of and the proper inquiry under the statutes by 
identifying relevant objective design features and other factors that 
are to be considered when determining how the statutory provisions 
apply to firearms equipped with ``stabilizing braces'' or other 
attachments. As discussed in this rule and the NPRM, ATF's review of 
the objective characteristics of the device is supported by Federal 
courts. See Brandon, 826 F.3d at 601-02. Additionally, ATF is 
publishing information simultaneously with this rule that will inform 
the public of both (1) common weapon platforms with attached 
``stabilizing brace'' designs and (2) examples of commercially 
available firearms equipped with a ``stabilizing brace'' that are 
short-barreled rifles.
iii. APA--Reliance by Public
Comments Received
    According to many commenters, ATF has approved the use of ``a 
shooting support with a pistol'' since at least 2006, and further, that 
pistol-braced firearms and pistol-brace accessories have been widely 
available and approved by ATF for sale since at least 2012. Commenters 
stated that millions of citizens were relying on ATF's guidance when 
making their purchase and took ATF at its word when the agency approved 
the installation of so-called ``stabilizing braces'' onto firearms in 
2012. Another commenter contended that the proposed rule represented a 
clear change in position for ATF on ``stabilizing braces.'' The 
commenter went on to say that ``the Supreme Court recently made clear 
that an agency action may be `arbitrary and capricious' because it 
fails to account for the reliance interests of those affected by the 
action.'' See Dep't of Homeland Sec. v. Regents of the Univ. of 
California, 140 S. Ct. 1891, 1913-15 (2020) (``Regents''). The 
commenter argued that the proposed rule could put millions of otherwise 
law-abiding Americans in danger of Federal criminal prosecution.
Department Response
    The Department disagrees that the rule is arbitrary in that it 
failed to account for the reliance interests of those affected by the 
action. See Regents, 140 S. Ct. at 1913-15. In Regents, the Supreme 
Court considered the recission of the Deferred Action for Childhood 
Arrivals programs and explained that, when an agency changes course 
from longstanding polices, reliance interests should be taken into 
account. Id. at 1913 (citing Encino Motocars v. Navarro, 579 U.S. 211, 
222 (2016)). The Supreme Court further clarified that the agency was 
not required to consider all policy alternatives but was required to 
assess whether there were reliance interests, determine whether they 
were significant, and weigh any such interests against competing policy 
concerns. Id. at 1915.
    While the Department acknowledges previous inconsistencies and the 
resulting confusion regarding ATF's private and public guidance on 
firearms equipped with ``stabilizing brace'' devices, ATF never 
declared that the marketing of a device as a ``stabilizing brace'' when 
equipped on a firearm removes that firearm from the ambit of the NFA. 
Additionally, ATF's private classification letters were limited to the 
particular firearm configured with the particular device that it 
received from an individual, and its analysis was based on the 
objective design features of that device or firearm in addition to 
consideration of the individual's purported intent. Therefore, an 
individual's reliance on a classification for another person's device 
or firearm transfers the agency's specific analysis to a different 
context and hence is misplaced. Similarly, an individual's reliance on 
the statements of a ``stabilizing brace'' manufacturer or a firearms 
manufacturer--especially statements that may misrepresent the 
government's position--does not represent reliance on a government 
policy and hence is misplaced. The Department also notes that 
commenters are mistaken in their assertion that ATF has approved the 
use of ``a shooting support with a pistol'' since at least 2006. ATF's 
first response to an inquiry about ``stabilizing'' braces was in 2012, 
as described in section II.B of this preamble.
    As it pertains to an individual's reliance on prior classification 
letters, ATF has notified the public that ``classifications are subject 
to change if later determined to be erroneous or impacted by subsequent 
changes in law or regulations.'' \99\ As previously discussed, ATF has 
discretion to correct its erroneous interpretations and rectify a 
firearms classification error, as occurred in many of ATF's 
``stabilizing brace'' classifications. Thus, because of ATF's inherent 
discretion to correct its erroneous interpretations, and because ATF 
has explicitly provided notice that it has such discretion, any 
potential reliance interest is reduced.
---------------------------------------------------------------------------

    \99\ ATF, National Firearms Handbook, sec. 7.2.4.1 (2009), 
<a href="https://www.atf.gov/firearms/docs/guide/atf-national-firearms-act-handbook-atf-p-53208/download">https://www.atf.gov/firearms/docs/guide/atf-national-firearms-act-handbook-atf-p-53208/download</a>.
---------------------------------------------------------------------------

    Moreover, contrary to the assumption of commenters, this rule bans 
nothing. The Department has provided several courses of conduct that a 
person in possession of a firearm that is regulated by the NFA may 
select, including registration of the device in the NFRTR within a 
defined time period, which would permit an individual to lawfully 
possess the firearm. Additionally, the individual may reconfigure the 
firearm to remove it from the scope of the NFA (e.g., the removal and 
replacement of a barrel of less than 16 inches with a longer barrel) 
and maintain possession of the firearm. These alternatives

[[Page 6508]]

demonstrate that the Department has considered the reliance interests 
of individuals and that any impact of this rule on individuals' 
perceived reliance interests will be minimal.
    It is true that ``the APA requires an agency to provide more 
substantial justification when . . . its prior policy has engendered 
serious reliance interests that must be taken into account.'' Perez v. 
Mortg. Bankers Ass'n, 575 U.S. 92, 106 (2015) (quoting FCC v. Fox 
Television Stations, Inc., 556 U.S. 502, 515, (2009)). But in light of 
the options provided for compliance with the relevant statutes, the 
alleged reliance interest is minimal. The only interest identified is 
the avoidance of the NFA's making and transfer taxes, but these taxes 
will not be applied retroactively. Thus, any potential reliance 
interests are minimal because, in its enforcement discretion, the 
Department has determined that individuals and FFLs will not be 
required to pay these taxes. And any interest in avoiding the minor 
burden associated with registration of a rifle is also not significant. 
That is both because of the minimal time and expense required for 
registration and because possession of an unregistered rifle violates 
the law. See Regents, 140 S. Ct. at 1914 (noting that the Department of 
Homeland Security could have properly found that ``reliance interests 
in benefits that [the agency] views as unlawful are entitled to no or 
diminished weight''). After carefully considering possible reliance 
interests, the Department thus finds that any reliance interests are 
outweighed by the need to properly and consistently apply the relevant 
statutes.
    Moreover, an individual's reliance on ATF's prior positions cannot 
outweigh the effective enforcement of Federal firearms laws pursuant to 
the best interpretation of the plain language of the relevant statutes. 
Here, the Department seeks to inform the public of the objective 
criteria and other factors it will consider to determine when a firearm 
is designed, made, and intended to be fired from the shoulder so that 
the Department can effectively enforce the NFA and GCA and protect 
public safety. As discussed in this preamble, the NFA and GCA regulate 
short-barreled rifles by imposing additional tax, interstate-
transportation, and interstate-transfer restrictions because Congress 
deemed them to be dangerous and unusual weapons. If certain firearms 
equipped with ``stabilizing brace'' devices are short-barreled rifles 
under the statutory definition, then the Department cannot permit the 
proliferation of the weapons in circumvention of the NFA.
iv. APA--Lack of Data
Comments Received
    Several commenters highlighted a lack of data to justify the rule 
and said that ATF ``provides no proof that these weapons are being 
fired from the shoulder.'' For example, one commenter stated the rule 
did not provide any analysis on the frequency with which pistol-braced 
firearms or short-barreled shotguns are being used in crime in order to 
justify the rule.
Department Response
    The Department disagrees that there is a lack of data to justify 
the rule. Because, as discussed above, short-barreled rifles are among 
firearms historically considered by Congress to be unusual and 
dangerous, the agency is required to implement the NFA and ensure that 
firearms are properly classified and regulated. As discussed in the 
NPRM, there have been at least two mass shooting incidents where the 
shooters reportedly shouldered their weapons by using purported 
``stabilizing braces'' as stocks,\100\ killing a total of 19 
people.\101\ The Department need not wait for such incidents to become 
more frequent before taking steps to stop them. See, e.g., Stilwell v. 
Off. of Thrift Supervision, 569 F.3d 514, 519 (DC Cir. 2009) 
(``[A]gencies can, of course, adopt prophylactic rules to prevent 
potential problems before they arise. An agency need not suffer the 
flood before building the levee.'') Further, as mentioned in section 
IV.A.2.a of this preamble, ATF has traced numerous firearms equipped 
with a ``stabilizing brace'' in connection with crimes in recent years, 
suggesting that weapons with ``brace'' devices are being used to commit 
crimes even apart from highly publicized incidents such as those in 
Boulder and Dayton.
---------------------------------------------------------------------------

    \100\ See, e.g., Emily Davies, Tim Craig, and Hannah Natanson, 
Ex-girlfriend Says Dayton Shooter Heard Voices, Talked about `dark, 
evil things', The Washington Post (Aug. 5, 2019) <a href="https://www.washingtonpost.com/national/police-chief-it-seems-to-defy-believability-that-dayton-shooter-would-kill-his-own-sister/2019/08/05/920a895c-b79e-11e9-b3b4-2bb69e8c4e39_story.html">https://www.washingtonpost.com/national/police-chief-it-seems-to-defy-believability-that-dayton-shooter-would-kill-his-own-sister/2019/08/05/920a895c-b79e-11e9-b3b4-2bb69e8c4e39_story.html</a> (``Dayton police 
spokeswoman Cara Zinski-Neace said Monday that Betts had modified 
his weapon so that he could stabilize it on his shoulder while 
firing. Betts had a `pistol version' of an AR-15-style rifle, she 
said, not designed to be shouldered. But Betts added a brace.''); 
Melissa Macaya et al., 10 killed in Colorado grocery store shooting, 
CNN (updated Mar. 23, 2021), <a href="https://www.cnn.com/us/live-news/boulder-colorado-shooting-3-23-21/h_0c662370eefaeff05eac3ef8d5f29e94">https://www.cnn.com/us/live-news/boulder-colorado-shooting-3-23-21/h_0c662370eefaeff05eac3ef8d5f29e94</a> 
(reporting that the firearm used in a shooting that killed 10 was an 
AR-15 pistol with an ``arm brace'').
    \101\ See supra note 67.
---------------------------------------------------------------------------

d. Violates the Americans with Disabilities Act (``ADA'') or the 
Rehabilitation Act of 1973
Comments Received
    Many commenters asserted that this rule violates the ADA or the 
Rehabilitation Act of 1973 and deprives thousands of gun owners who 
have disabilities from the joy of shooting their lawfully owned 
firearms. Specifically, commenters stated that ``ATF is prohibited from 
making such discriminatory rules under [ the ADA]'' and that section 
504 provides in part that ``no qualified individual with a disability . 
. . shall be excluded from, denied the benefits of, or be subjected to 
discrimination under'' any program or activity that . . . is conducted 
by any Executive agency. Several other commenters stated that 
``stabilizing braces'' were first made and submitted for classification 
to assist persons with disabilities, and that ATF did not consider the 
impact the rule would have on disabled Americans. Another commenter 
stated that ATF's rulemaking, i.e., the purported ``activity'' 
conducted by an Executive agency, ``discriminates against disabled 
persons by arbitrarily limiting design characteristics [of `braced' 
pistols] that enhance the effectiveness of the brace design for the 
disabled person.'' The commenter stated that there is no evidence that 
any of the restrictions--weight, adjustability, sights, overall length, 
length of pull--were determined after consideration of the needs of the 
disabled community and that these restrictions would adversely impact 
the disabled community, deny them the benefit of the product intended 
for them, and discriminate against them in violation of the ADA.
    Other commenters said this rule would limit the future availability 
of ``stabilizing braces'' to the disabled community if the effect of 
the rule is to reclassify millions of ``stabilizing brace''-equipped 
pistols as being subject to the NFA.
Department Response
    The Department disagrees with commenters that the rule would 
violate the ADA. As an initial matter, the ADA applies to State and 
local governments; it does not apply to the Executive Branch of the 
Federal Government. See 42 U.S.C. 12131(1) (defining ``public entity'' 
as any State or local government; any department, agency, special 
purpose district, or other instrumentality of a State or States or 
local government; and the National Railroad Passenger Corporation, and 
any commuter authority). Accordingly,

[[Page 6509]]

because ATF is a Federal agency that is not subject to the ADA, the 
commenters' assertion that this regulation would violate the ADA is 
incorrect. In addition, commenters' ADA objections to the rule are 
misplaced because the rule does not itself ban or regulate any 
particular devices; instead, the rule articulates the Department's best 
interpretation of the relevant statutory provisions, which are the 
source of any restrictions or regulations on certain firearms.
    In contrast to the ADA, the Rehabilitation Act of 1973 does apply 
to the Federal Government. However, this rule likewise does not violate 
that Act. Section 504 of the Rehabilitation Act prohibits the 
discrimination ``solely by reason of disability'' in Federally 
conducted programs and activities. 29 U.S.C. 794(a). The Rehabilitation 
Act ``requires that people who are disabled within the meaning of the 
Act have meaningful access to the federal government's programs or 
activities.'' National Ass'n of the Deaf v. Trump, 486 F. Supp. 3d 45, 
57 (D.D.C. 2020) (quotation marks omitted). The ``relevant inquiry is 
whether those with disabilities are as a practical matter able to 
access benefits to which they are legally entitled.'' Id. (quotation 
marks omitted). As applied here, the classification of a firearm is not 
a ``program or activity'' as defined in section 794(b) of the Act. See 
29 U.S.C. 794(b) (listing covered programs and activities). Second, no 
one is legally entitled to violate the NFA. Third, as explained below, 
neither the statute nor the rule denies or impedes anybody meaningful 
access to anything.
    This rule does not restrict the use of a ``stabilizing brace.'' A 
weapon with a ``stabilizing brace'' may be possessed without any NFA 
restrictions if that weapon falls outside the NFA's definition of 
``firearm,'' (e.g., the weapon is not designed, made, and intended to 
be fired from the shoulder); thus, even after issuance of this rule, 
persons with disabilities will be able to purchase and use certain 
``stabilizing braces'' without regulation under the NFA. Moreover, even 
a weapon with a ``stabilizing brace'' that falls within the definition 
of ``firearm'' in the NFA may be possessed and used if the statutory 
requirements are followed. All individuals who possess such a firearm 
may register that firearm in the NFRTR. There are other options 
available, discussed in section V.B of this preamble, for all 
individuals affected by the NFA's restrictions so they can continue to 
use a ``stabilizing brace'' while remaining in compliance with the law.
    Finally, persons with disabilities are not denied benefits or 
subject to discrimination under this rule ``solely by reason of their 
disability.'' This rule articulates the Department's best 
interpretation of the relevant statutory provisions, and ATF interprets 
and uniformly applies those provisions to every person. Notably, it 
appears that no commenter provided any specific information to suggest 
that this rule, or the NFA's requirements, would cause qualified 
individuals with disabilities, solely by reason of their disability, to 
be excluded from the participation in, subjected to discrimination 
under, or denied the benefits of any program or activity of ATF. 
Accordingly, there is nothing in the record to suggest that this rule 
would raise concerns under the Rehabilitation Act of 1973, and the 
Department disagrees that this rule ``adversely impact[s] the disabled 
community, or [denies] them the benefit of the product intended for 
them.''
2. Definition of ``Rifle''
Comments Received
    The Attorney General of Ohio stated that DOJ's interpretation of 
``rifle'' was arbitrary and had no basis in the statutory text. Another 
commenter argued that the definitions of ``rifle'' in the GCA and NFA 
are inconsistent and that ATF's interpretation in the NPRM confuses the 
existing regulations by introducing arbitrary and subjective factors. 
Thus, the commenters stated that ATF's claim of having proposed this 
rule to ``clarify when a rifle is intended to be fired from the 
shoulder'' is impossible to decipher. One commenter also stated that 
ATF's claim of clarifying when a rifle is intended to be fired from the 
shoulder is misleading to the public, and, thus, the public would 
misunderstand the purpose of the rule. The same commenter stated that 
there was no need for this purported amendment of the statutory 
definition of ``rifle,'' as the rule should focus on approving or 
disapproving ``stabilizing braces. Another commenter noted that the 
term ``peripheral accessories''--a term used in the proposed regulatory 
text--lacked a proper definition.
Department Response
    The Department respectfully disagrees with the characterization 
that this interpretation of the term ``rifle'' is arbitrary and without 
statutory basis. Congress, in drafting the GCA and NFA, purposefully 
defined ``rifle'' broadly. Specifically, the GCA defines the term 
``rifle'' as ``a weapon designed or redesigned, made or remade, and 
intended to be fired from the shoulder and designed or redesigned and 
made or remade to use the energy of an explosive to fire only a single 
projectile through a rifled bore for each single pull of the trigger.'' 
18 U.S.C. 921(a)(7). The NFA defines the term ``rifle'' as ``a weapon 
designed or redesigned, made or remade, and intended to be fired from 
the shoulder and designed or redesigned and made or remade to use the 
energy of the explosive in a fixed cartridge to fire only a single 
projectile through a rifled bore for each single pull of the trigger, 
and shall include any such weapon which may be readily restored to fire 
a fixed cartridge.'' 26 U.S.C. 5845(c). Despite slightly different 
wording, both statutes share a common focus in defining the term 
``rifle'' in that whether a weapon is a rifle depends primarily on 
whether it is designed, made, and intended to be fired from the 
shoulder. This rule provides a clear explanation and guidance to both 
individual owners and manufacturers regarding the objective design 
features and other factors that indicate whether a firearm equipped 
with a ``stabilizing brace'' or other rearward attachment is a 
``rifle'' designed, made, and intended to be fired from the shoulder.
    Likewise, the Department disagrees with commenters that it is 
misleading the public when it claims that the purpose of the rule is to 
clarify when a rifle is designed, made, and intended to be fired from 
the shoulder. Due to inconsistent advice regarding how the use of a 
``stabilizing brace'' device affected a classification and the 
resulting public confusion on the proper application of the NFA and GCA 
to firearms with ``stabilizing braces,'' as described in the NPRM and 
this final rule, the Department seeks to inform the industry and public 
on the best interpretation regarding when ``a firearm is designed . . . 
, made . . . , and intended to be fired from the shoulder'' within the 
meaning of the relevant statutory terms.
    Also, the Department disagrees that there is no need to clarify the 
term ``rifle'' and that ATF should focus on only approving or 
disapproving ``stabilizing braces.'' As described earlier, the GCA and 
NFA regulate ``firearms'' and generally do not regulate the 
classification or use of individual components or accessories, standing 
alone. Accordingly, ATF generally does not classify components or 
accessories, unconnected to a particular firearm, under the GCA and 
NFA. However, components or accessories, when attached to a firearm, 
can affect the classification of a firearm because: (1) a component or 
an accessory's likely use

[[Page 6510]]

in the general community may be relevant in assessing the 
manufacturer's or maker's purported intent with respect to the design 
of a firearm; and (2) the design of a component or an accessory may 
result in a firearm falling within a particular statutory definition. 
Two examples would be: (1) the attachment of a secondary forward grip 
to a ``pistol,'' where the resulting firearm would no longer be 
designed to be held and fired with a single hand; and (2) a wallet 
holster where the handgun can be fired while inserted, thus changing 
the classification of these handguns into an ``any other weapon.'' See 
26 U.S.C. 5845(e). A ``stabilizing brace,'' of which there are many 
variations, is another example of an attachment that may affect the 
classification of the firearm to which it is attached. The question, 
however, remains whether the firearm as configured with the ``brace'' 
device is designed, made, and intended to be fired from the shoulder, 
even if the ``stabilizing brace'' has an alternate use that effectuates 
single-handed firing.
    The rule's amendment to the definition of ``rifle'' does not use 
the term ``accessory,'' and therefore the definition of that term is 
irrelevant to this rule. Nonetheless, if the term ``accessory'' is 
relevant, the Department maintains it would not be necessary to further 
provide a definition for this term.\102\
---------------------------------------------------------------------------

    \102\ Regarding the use of the term ``accessory'' in this rule, 
see supra note 35. For purposes of the AECA, ATF has consulted the 
definition of ``accessory'' found in 22 CFR 121.8, which is part of 
the International Traffic in Arms Regulations administered by the 
Department of State.
---------------------------------------------------------------------------

3. ATF Worksheet 4999
a. General Opposition to Worksheet 4999
Comments Received
    There was general dissatisfaction with the proposed Worksheet 4999. 
Several commenters claimed that the worksheet was designed in such a 
way that the average person would not know if their handgun with an 
attached ``stabilizing brace'' was an NFA firearm without first 
obtaining a determination from FATD. Many commenters stated that they 
found the worksheet not only to be confusing and overly complex to 
determine if their firearm with a ``brace'' device is a rifle, but also 
that the worksheet was ``rife with factual errors.'' The Ohio Attorney 
General argued that ``the brace itself is not a `weapon,' '' so it 
``cannot be a rifle on its own,'' and another commenter stated ``ATF 
has clearly approached this problem solely from the standpoint of a 
short-barreled rifle and has not examined what features are useful for 
a pistol.'' Generally, commenters did not understand the reasoning 
behind Worksheet 4999, with one commenter stating that ``[i]f the act 
of shouldering a pistol does not make it a [short-barreled rifle], why 
does it matter whether the stabilizing brace design encourages, 
discourages, or prevents shouldering?'' They also claimed that the 
worksheet, which followed a complex, mathematical formula, was a 
radical departure from the GCA's definition of ``rifle.'' One commenter 
said that ATF ``make[s] a weak argument on how to objectively 
categorize pistols with braces versus [short-barreled rifles].''
    One commenter argued that the proposed rule and Worksheet 4999 
focused on factors that assess grip rather than factors that assess 
shouldering. By focusing on grip, the commenter argued, ATF's reasoning 
is ``divorced from statutory text.'' The commenter argued that it 
unreasonable and unfair for ATF to adopt a rule that weighs indicia 
that braced pistols may be fired with two hands as evidence that the 
braced pistols are NFA firearms or GCA short-barreled rifles.
Department Response
    As stated in the NPRM, the proposed Worksheet 4999, including the 
points assigned to each criterion, was intended to facilitate the 
evaluation by individuals or members of the industry of whether a 
weapon incorporating a purported ``stabilizing brace'' created a rifle 
and, possibly, a short-barreled rifle under the GCA and NFA. Worksheet 
4999 was intended to ensure uniform consideration and application of 
the statutory definition of those terms. Based on the comments 
received, the Department agrees that the proposed Worksheet 4999 and 
point system did not achieve these intended purposes. The Department 
acknowledges commenters' concerns that the proposed worksheet was 
confusing and complex but disagrees that the worksheet was ``rife with 
factual errors.'' The background section, above, highlights the 
objective characteristics considered in ATF's prior evaluations, 
including the weight of the firearm, the length of pull, the 
adjustability of the device attached to the firearm, the existence of a 
forward grip, and other accessories. The Department acknowledges in 
this rule that it had incorrectly included in the proposed regulatory 
changes some design characteristics that are not indicative of whether 
a firearm is designed and intended to be fired from the shoulder. As 
described in this rule, the relevant inquiry under the NFA and GCA for 
the definition of ``rifle'' is whether the firearm is designed, made, 
and intended to be fired from the shoulder.
    In this regard, the Department agrees with commenters like SB 
Tactical who argued that the NPRM and the worksheet improperly assessed 
gripping the firearm with one hand rather than assessing factors for 
shouldering the firearm because gripping with one hand is not relevant 
to the statutory inquiry of ``rifle.'' Indeed, the Department agrees 
that the proposed analysis in the NPRM, vis-[agrave]-vis Worksheet 
4999, continued to use the analysis from prior classifications that 
placed improper weight on whether the ``stabilizing brace'' at issue 
could be used as a ``brace'' to support single-handed fire, even if the 
objective design features of the firearm equipped with the ``brace'' 
indicated the weapon had been designed, made, and intended to be fired 
from the shoulder. In light of the comments, the final rule identifies 
and selects from the NPRM only those features that are relevant in 
determining whether a firearm is designed, made, and intended to be 
fired from the shoulder under the GCA and NFA. Therefore, design 
characteristics from the proposed Worksheet 4999 (e.g., stabilizing 
support or configuration, presence of hand stops and secondary grips, 
and presence of a bipod) are not included in this rule because they are 
not relevant to determine whether a firearm is designed, made, and 
intended to be fired from the shoulder.
    The Department also agrees with commenters that a ``stabilizing 
brace'' itself is not a weapon, and therefore the Department updates 
the regulation to reflect how the ATF now classifies a firearm for 
purposes of the GCA and NFA--i.e., by assessing the firearm with the 
attached ``brace'' device as a whole. The Department disagrees that 
``ATF has clearly approached this problem solely from the standpoint of 
a short-barreled rifle and has not examined what features are useful 
for a pistol.'' After careful review and consideration, ATF recognizes 
that many prior classifications incorrectly weighed the utility of the 
purported ``stabilizing brace'' to allow for effective one-handed 
firing. The Department has determined, however, that the best 
interpretation of the statutory definitions requires an assessment that 
goes beyond the effectiveness of a ``stabilizing brace'' device for 
single-handed firing. The Department's interpretation of the statutes, 
as reflected in this rule, focuses on the objective design features of 
the firearm and the attached ``stabilizing brace'' to ensure that 
applying that

[[Page 6511]]

interpretation properly classifies firearms that are designed, made, 
and i

[…truncated; see source link]
Indexed from Federal Register on January 31, 2023.

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.