The FailZero M16/M4 Bolt Carrier Group delivers reliable cycling for AR-15 and M16 pattern rifles without the included hammer, making it ideal for builders who already have fire control components or prefer to source them separately.
- Part Type: Bolt Carrier Group (No Hammer)
- Compatible Firearms: AR-15, M16, M4, 5.56 NATO/.223 Wylde chambered rifles
- Material: Carpenter 158 steel bolt, 8620 steel carrier
- Finish: FailZero EXO Nickel Boron coating
- Testing: MPI and HPT tested
- Installation: Drop-in for mil-spec AR-15 upper receivers
- Includes: Bolt carrier, bolt assembly, cam pin, firing pin, gas key (staked), retaining pin
