RECEIVER EXTENSTION (BUFFER TUBE) 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 SBA4™ SPECIFICATIONS FIT:All platforms capable of accepting a mil-spec carbine extension CAVITY DEPTH:6.75″ LENGTH:7.5″, 8.25″, 8.8″, 9.5″, 10.25″ STRAP WIDTH:1″ WEIGHT:10 oz COLOR:Black WIDTH [MAX]:2.25″