RISE Armament advanced bolt-carrier group (BCG) manufactured with precision and individually inspected to ensure high-level performance

  • High-strength and easy-to-clean black nitride finish
  • 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