This is a mil-spec carbine buffer tube (receiver extension) for the AR-15, CNC-machined from 6061-T6 aluminum in the USA and hard-anodized. The six-position design lets you adjust stock length of pull across a mil-spec carbine receiver extension.
Features:
Fits mil-spec AR-15 carbine stocks. This is the buffer tube only and does not include a buffer, recoil spring, castle nut, or end plate. Note that mil-spec and commercial-spec tubes are not interchangeable.
