It’s a great time to be an AR pistol. SB Tactical presents another option for fans of shoulderless shooting. This guy is a five-position arm brace that includes a standard Mil-spec carbine receiver extension. That means you can skip the use of a dedicated pistol extension and SB Tactical says it has a 2002 ATF determination letter to back this use up. They tell us swapping a standard stock with an SBA3 on an SBR legally reconfigures it, allowing the firearm to travel across state lines without the need to file an ATF form 5320. The brace includes an ambi QD sling socket and a nylon wrist strap.