TITLE: Factoring Criteria for Firearms With Attached 'Stabilizing Braces' AGENCY: Bureau of Alcohol, Tobacco, Firearms, and Explosives, Department of Justice ACTION: Final rule 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 31 January 2023. Compliance Date: Any weapons with 'stabilizing braces' or similar attachments that constitute rifles under the NFA must be registered no later than 31 May 2023. This final rule and the notice of proposed rulemaking; request for comment notified as G/TBT/N/USA/1739 are identified by Docket Number ATF 2021R-08. The Docket Folder is available on Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by…