*CANNOT BE COMBINED WITH ANY OTHER DISCOUNTS OR PROMO CODES
Mil-Spec fits 1.14" O.D. buffer tubes mount on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, LMT, Ruger, S&W, SIG, and others
Commercial fits larger, 1.17" O.D. commercial carbine buffer tubes mount on commercial-spec sized carbine receiver extension tube (not included) from manufacturers such as Bushmaster, DPMS, and others
Buffer tube, carbine buffer, receiver extension nut, and carbine-length action spring not included.