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.
Mil-spec Kit: Mag400, Mag418, Mag415, Mag413
Commercial Kit: Mag401, Mag418, Mag415, Mag413
SKU: MIDKITS

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