Does the stabilizing brace make a shorter AR barrel legal for

Wing Tactical's Guide to AR-15 Pistols

Gun expert explains new ATF short-barrel rifle rule as registration deadline approaches

Federal Register :: Factoring Criteria for Firearms With Attached “Stabilizing Braces”

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How the New ATF Pistol Brace Rule Will Affect Oklahoma Gun Owners

Time's up: Is your AR-style pistol brace registered as short-barreled rifle?

The Pistol That Looks Like A Rifle: The Dayton Shooter's Gun : NPR

Feds: Popular AR pistol is now dangerous rifle that must be registered

Building An SBR - RailScales LLC