Product Description
RISE Armament advanced bolt-carrier group (BCG) manufactured with precision and individually inspected to ensure high-level performance. FEATURES 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 Mfg: Rise Armament