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ATF is back with their attack against pistol/stabilizing braces. The proposed rule includes a worksheet that scores various attributes of the weapon being factored. Basically, any "pistol" that gets a score of 4 or more is deemed a "rifle" and more specifically a "short barreled rifle" requiring NFA registration. The intent is quite obvious - remove the SBR workaround provided by those pistol braces. The worksheet itself is something to behold.
The proposed rule has not yet been published in the Federal Register allowing for comments. I'll update this post when it does.
www.atf.gov
What is Proposed in this Rulemaking?
The proposed rule would:
Link to proposed rule.
deleted since it is now published at the Federal Register (see below)
Link to Federal Register where you can submit comments in a constructive manner on or before September 08, 2021.
www.federalregister.gov
The proposed rule has not yet been published in the Federal Register allowing for comments. I'll update this post when it does.
Factoring Criteria for Firearms with Attached “Stabilizing Braces” | Bureau of Alcohol, Tobacco, Firearms and Explosives
On January 13, 2023, the Attorney General signed ATF final rule 2021R-08F, “Factoring Criteria for Firearms with Attached ‘Stabilizing Braces,’” amending ATF’s regulations to clarify when a rifle is designed, made, and intended to be fired from the shoulder. The final rule was published in the...
The proposed rule would:
- Amend the definition of “rifle” in 27 CFR 478.11 and 479.11, respectively, by adding a sentence at the end of each definition to clarify that the term “rifle” includes any weapon with a rifled barrel and equipped with an attached “stabilizing brace” that has objective design features and characteristics that indicate that the firearm is designed to be fired from the shoulder.
- Set forth a worksheet “Factoring Criteria for Rifled Barrel Weapons with Accessories commonly referred to as ‘Stabilizing Braces,’” ATF Worksheet 4999, to aid the firearms industry and public in understanding the criteria that ATF considers when evaluating firearm samples that are submitted with an attached “stabilizing brace” or similar component or accessory.
Link to proposed rule.
deleted since it is now published at the Federal Register (see below)
Link to Federal Register where you can submit comments in a constructive manner on or before September 08, 2021.

Factoring Criteria for Firearms With Attached “Stabilizing Braces”
The Department of Justice (``Department'') proposes amending Bureau of Alcohol, Tobacco, Firearms, and Explosives (``ATF'') regulations to clarify when a rifle is ``intended to be fired from the shoulder.'' The Department proposes factors ATF considers when evaluating firearms equipped with a...
