Since the 1930s, the NFA has imposed requirements on short-barreled rifles because they are more easily concealable than long-barreled rifles but have more destructive power than traditional handguns.
US pistol brace rule likely illegal, federal appeals court rules
ATF Faces Immediate Nationwide Block of Pistol Brace & Short
Republican states sue Biden administration over new pistol brace
Pistol Brace Regulation Blocked in Nationwide Injunction from
NRA-ILA ATF Posts “Final” Rule on Stabilizing Braces
Federal Register :: Factoring Criteria for Firearms With Attached
Pistol Brace Regulation Blocked in Nationwide Injunction from
GOP gun rights effort snuffed out in the Senate
Federal Register :: Factoring Criteria for Firearms With Attached
Federal Register :: Factoring Criteria for Firearms With Attached
Federal Register :: Factoring Criteria for Firearms With Attached
Pistol Braces That Evade Federal Restrictions on Short-Barreled
Federal Register :: Factoring Criteria for Firearms With Attached
Judge Blocks ATF From Enforcing Biden's Pistol Brace Rule Na
Pistols With 'Stabilizing Braces' Are Now NFA Short-Barreled