The Armaspec enhanced buffer tube kit contains all the necessary parts required to mount a stock assembly on to a lower receiver.

The buffer tube kit, contains a mil-spec 7075-T6 6 position buffer tube, a steel castle nut and end plate as well as a SRS™ GEN3 the enhanced multi stage recoil buffer system .

[The Stealth Recoil Spring™ SRS™ GEN3 is a self-contained multi-stage drop-in replacement for your standard buffer and spring. The SRS™ is designed to keep the buffer spring from rubbing against the inner wall of the buffer tube providing smooth, quiet operation and the second stage helps reduce the felt recoil significantly.]