The SBA5 Pistol Stabilizing Brace is 5-position adjustable and designed for all platforms capable of accepting a mil-spec carbine receiver extension Pistol Stabilizing Brace is 5-position adjustable and designed for all platforms capable of accepting a mil-spec carbine receiver extension. Featuring an integral, ambidextrous QD sling socket and an arm cuff based on the original SB15A(R), the SBA5 greatly enhances the usability of the host firearm by providing an additional point of contact. The SBA5 is compatible with any Mil-Spec carbine receiver extension (not included).