Improves Reliability & Control, Softens Felt Recoil

Extra-heavy to soften felt recoil on semi-auto and full-auto guns; added mass reduces cyclic rate during full-auto fire. Provides smoother function for faster follow-up shots to help improve on-target accuracy. Stops bolt bounce on full-auto CAR-15's to increase feeding and extraction reliability. Drop-in installation, uses standard recoil spring. Fits AR-15/CAR-15 with collapsible stock only