Simple drop-in installation Modified AR10 is recommended for maximum reliability Reduces felt recoil Compatible with .308 ARs ranging from: Armalite, DPMS, Remington, Knight’s, LMT, Larue, POF, Mega, Fulton, And CMMGGet the AR10/308AR CAR-10 Buffer. Mfg: Heavy Buffers SPECS: Fits Carbine length butt stock systems only.