Advanced Technology A5101050 AR-15 Commercial Buffer Tube Assembly 7.8" 6-Position Black

The Advanced Technology A5101050 is a Commercial-spec AR-15 buffer tube assembly - the aluminum receiver extension that mounts to the rear of an AR-15 lower receiver and provides both the housing for the rifle's buffer and recoil spring and the sliding rail that a collapsible buttstock rides on. Built around a 6-position, 7.8" hard-coat anodized 6061-T6 aluminum tube with a slanted back profile, this assembly is a direct fit for AR-15 lowers cut for the commercial buffer tube standard.

Tube and thread dimensions are commercial-spec at approximately 1.17" diameter, which matters when pairing this tube with a buttstock and castle nut: commercial and mil-spec buffer tubes are not interchangeable with the same furniture. If you are building or rebuilding an AR-15, confirm the standard of your lower and your intended stock before purchase. The black hard-coat anodized finish provides corrosion and wear resistance and matches typical AR-15 lower receiver aesthetics.

The A5101050 keeps installed weight low while delivering the strength needed for the buffer and spring to cycle reliably under sustained fire, and the 6-position layout lets the shooter dial in length of pull to suit body armor, shooting position, or loadout. This listing is for the buffer tube assembly only; the buttstock, buffer, recoil spring, and castle nut are sold separately.