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 .

• SRS-BB Buffer, 5.7oz.
• Includes SRS Buffer, 6 Position Buffer Tube, Endplate and Castle Nut.
• Fits AR-15 Pattern Firearms.