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:FDE WIDTH [MAX]:2.25"