Rise Armament AR-15/M-16 Bolt Carrier Group - AR-15 Bolt-Carrier Group - Nickel Boron
RISE Armament advanced bolt-carrier group (BCG) manufactured with precision and individually inspected to ensure high-level performance. Coated with nickel boron to reduce friction and improve overall performance.
- Coated with nickel boron to reduce friction and improve the rifle's overall performance
- Unit weight: 11.6 oz.
- Individually MPI tested
- Bolt: 9310 MPI tested
- Carrier: 8620 tool steel heat treated and case hardened
- Gas key: tool steel - grade 8 hardened fasteners and staked properly
- Cam pin: 4140 steel
- Extractor: tool steel – shot peened