RISE Armament® advanced Bolt Carrier Group, manufactured with absolute precision, then individually inspected to ensure top-level performance. Your choice of Black Nitride finish or Nickel Boron finish.
- For 5.56 NATO, .223 Remington, and similar
- Individually MPI-tested
- Bolt: 9310 MPI-tested
- Carrier: 8620 tool steel, heat-treated and case-hardened
- Gas key: Tool steel, grade 8 hardened fasteners, staked properly
- Cam pin: 4140 steel
- Extractor: Tool steel, shot peened