Mil-Spec Carbine kit is for adjustable-length carbine buttstock that requires M4-type 1.14" O.D. buffer tube.
Includes receiver extension tube, carbine recoil buffer, buffer spring, receiver plate, and lock nut.
SPECS: Mil-Spec Carbine – Receiver extension: 7¼" OAL (18.4cm), 1.14" O.D. Four locking positions for buttstock, unless otherwise indicated.
Style: Carbine, Mil-Spec
MADE IN THE USA