The SBA4 is the next evolution in adjustable stabilizing braces designed by SB Tactical. Based on the original design of the SBM4, the SBA4 provides a more comfortable cheek weld and more rugged and reinforced design. Designed for all platforms capable of accepting a mil-spec carbine receiver extension, the SBA4(TM) is 5-position adjustable, dramatically enhances versatility, and features an integral, ambidextrous QD sling socket.Features: Designed after the SBM4(TM) 5-position adjustable Includes mil-spec carbine receiver extension Integral, ambidextrous QD sling socket ATF compliant, US veteran designed and proudly made in the USA Product includes: brace, adjustable nylon strap DOES NOT COME WITH BUFFER TUBE