AR-15 M4 Buffer Tube (Mil-Spec)

Mil-spec receiver extension tube has the correct 1.14″ outside diameter to ensure proper fit of adjustable mil-spec carbine stock.  Allows you to  convert a rifle with a fixed A2 style stock to an adjustable M4 stock, or complete a custom build. Six machined notches on the underside prevent the stock locking pin from slipping, yet still  offer outstanding ease and flexibility in setting the buttstock length. Precision machined from strong, lightweight 7075 aluminum, then hardcoat anodized with a hard, wear-resistant matte black finish. Please note that depending on your needs you may also require the castle nut and/or retaining plate to complete the installation of this buffer tube assembly. You may also require the buffer itself and/or the recoil spring.