Designed for all platforms capable of accepting a mil-spec carbine receiver extension, the SB Tactical SBA4 is 5-position adjustable and features an integral, ambidextrous QD sling socket. The SBA4 is compatible with any mil-spec carbine receiver extension (not included). FeaturesDesigned after the SBM45-position adjustableIntegral, ambidextrous QD sling socketUS veteran designedIncludes: Brace, Adjustable nylon strap