Designed after the SBM4 5-position adjustable Integral, ambidextrous QD sling socket US veteran designed and proudly made in the USA Designed 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).table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }