Coating: Black Nitride or durable, friction-reducing Nickel Boron coating
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.