People with affected firearms have 120 days to comply.
The BATFE's New Rule on Brace-Equipped Firearms
New York Defies Supreme Court
Published Articles – Panoply Tactical
Injunction: Are Pistol Braces Legal (Again) - The Shooter's Log
How to Change Your AR Pistol to an SBR - Firearms News
Payne County Sheriff won't enforce ATF stabilizing brace rule, Local News
The BATFE's New Rule on Brace-Equipped Firearms
Proposed ATF Brace Regulations Nothing More Than Registration Scheme
Time To Act: ATF To Classify Braced Firearms as NFA Items
ATF Targets Stabilizing Braces An Official Journal Of The NRA
Supreme Court Strikes New York Carry Restriction
Gun brace rule is common sense
BREAKING: ATF Announces 'Factoring Criteria for Firearms with Pistol Stabilizing Braces' Rule - The Truth About Guns