SB Tactical SBA4 Brace AR-15 OD GreenDesigned for all platforms capable of accepting a mil spec carbine receiver extension the 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). Features: Designed after the SBM4 5 position adjustable Integral ambidextrous QD sling socket US veteran designed and proudly made in the USA Product includes: Brace Adjustable nylon strap