Designed for all platforms capable of accepting a mil-spec carbine receiver extension, the SBA3 is 5-position adjustable, dramatically enhances versatility, and features a minimalist design with an integral, ambidextrous QD sling socket. The SBA3 is compatible with any mil-spec carbine receiver extension (not included). Features: Minimalist design 5-position adjustable Integral, ambidextrous QD sling socket US veteran designed and proudly made in the USA Product Includes: Brace Adjustable nylon strap