RISE Armament's .308 advanced bolt-carrier group (BCG) is 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