Ensure rock-solid performance with the ATI Military-Spec Buffer Tube Assembly. Machined from premium 6061-T6 aluminum with a durable hard-coat anodized finish, this 6-position tube features precise mil-spec thread (1.19) and tube (1.148) diameters for a perfect fit with standard military stocks. This comprehensive package includes an AR-15 recoil plug, buffer spring, and a rugged military-grade E-coated steel castle nut and locking ring, providing maximum reliability and strict tolerance control for your AR platform.