CMMG 55CA977 Buffer Assembly Silver AR-15 Carbine

The CMMG 55CA977 is a carbine-length buffer assembly designed for the AR-15 / M4-pattern platform. This direct-fit replacement buffer is the same component used in CMMG's 6-position M4 stock kits and is built to mil-spec standards for reliable cycling with any mil-spec carbine action spring.

CMMG specifies that this buffer must be paired with an AR-15 carbine action spring and an M4 / carbine-length buffer tube to function properly. It is also fully compatible with CMMG's Fastback Receiver Extension. The buffer meets or exceeds mil-spec tolerances and is finished in a clean silver finish.

Whether you are replacing a worn buffer in an existing carbine build or completing a CMMG stock kit, the 55CA977 delivers the consistent weight and stroke geometry the AR-15 / M4 pattern requires for reliable cycling.