ATF Stabilizing Brace Rule Rescission (Factoring Criteria Removal)

Current understanding

ATF has issued a proposed rule to remove the 2023 final rule (Factoring Criteria for Firearms with Attached 'Stabilizing Braces') that treated braced pistols as short-barreled rifles subject to the National Firearms Act. The 2023 rule was largely vacated or enjoined by multiple federal courts on Administrative Procedure Act grounds, and this rulemaking would formally rescind the regulatory definition. Status: proposed rule; fiscal implications include reduced NFA registration and enforcement workload at ATF and elimination of related compliance costs for owners and manufacturers of brace-equipped firearms.

Evidence log

• 2026-05-06 — Revising Machine Gun Definition in Response to Supreme Court Decision: cross-connection with atf-bump-stock-definition-cargill-conforming: Both are ATF rulemakings unwinding prior firearms classifications following adverse court rulings — bump stocks per Garland v. Cargill and stabilizing braces per APA challenges to the 2023 factoring-criteria rule. (novelty: 2)

Open questions

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