The BCM MK2 Buffer MOD1 T4 is an enhanced rifle recoil system engineered for AR15 platforms that prioritizes consistent performance and shootability. This intermediate-length buffer combines a heavier 7.4 oz counterweight with a full-length M16A4-spec action spring to manage felt recoil and support more reliable cycling across a wider range of ammunition and configurations. If you're building or upgrading an AR for hunting, competition, or general marksmanship, a quality buffer system is often an overlooked foundation—but getting it right pays dividends in how your rifle tracks and recovers between shots.

BCM's design philosophy here centers on carrier velocity consistency. By increasing the internal travel of the counterweight and adding an internal spring mechanism, the MK2 MOD1 reduces bolt bounce and noise while maintaining the tighter tolerances that modern precision demands. The 7075-T6 aluminum construction, hard-coat anodized finish, and mil-spec components are built to last through thousands of rounds without degradation. The T4 weight sits in the middle of BCM's intermediate buffer lineup, making it a solid all-around choice for standard and mid-length gas systems.

Important: this buffer system is designed exclusively for AR15 receivers and requires both the BCM MK2 Receiver Extension and the mil-spec M16 action spring to function safely and as designed. Using non-compatible components risks damage to the rifle and potential injury. If you're starting from scratch or swapping in this system, verify your upper and lower are compatible and source the proper matched components.

The BCM MK2 Buffer MOD1 T4 is an enhanced rifle recoil system engineered for AR15 platforms that prioritizes consistent performance and shootability. This intermediate-length buffer combines a heavier 7.4 oz counterweight with a full-length M16A4-spec action spring to manage felt recoil and support more reliable cycling across a wider range of ammunition and configurations. If you're building or upgrading an AR for hunting, competition, or general marksmanship, a quality buffer system is often an overlooked foundation—but getting it right pays dividends in how your rifle tracks and recovers between shots.

BCM's design philosophy here centers on carrier velocity consistency. By increasing the internal travel of the counterweight and adding an internal spring mechanism, the MK2 MOD1 reduces bolt bounce and noise while maintaining the tighter tolerances that modern precision demands. The 7075-T6 aluminum construction, hard-coat anodized finish, and mil-spec components are built to last through thousands of rounds without degradation. The T4 weight sits in the middle of BCM's intermediate buffer lineup, making it a solid all-around choice for standard and mid-length gas systems.

Important: this buffer system is designed exclusively for AR15 receivers and requires both the BCM MK2 Receiver Extension and the mil-spec M16 action spring to function safely and as designed. Using non-compatible components risks damage to the rifle and potential injury. If you're starting from scratch or swapping in this system, verify your upper and lower are compatible and source the proper matched components.