Rise Armament RA-1010 Bolt Carrier Group 223/5.56 NATO Black Nitride 4140 Steel RA1010BLK

Precision manufactured and individually inspected to ensure high-level performance - Strong easy-to-clean black nitride finish - Compatible with lighter buffers to allow faster follow-up shots - 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 - Lightweight only 8.9 oz. Manufacturer Part Number: RA1010BLK