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NiBx Coated
Individually MPI Tested
9310 MPI tested Bolt
Carrier: 8620 Tool Steel-Heat Treated, Case Hardened
Gas Key: Tool Steel-Attached using Grade 8 Hardened Fasteners, & Staked.
Cam Pin: 4140 Steel
Extractor:Tool steel-shot peened

Features a shot-peened bolt for increased surface strength and durability, and an extractor booster to ensure reliable cycling during rapid semi-auto or full-auto fire. Includes firing pin upgrade. Each assembly is magnetic particle inspection tested to ensure it’s free from imperfections that can lead to premature failures. Properly staked gas key prevents gas leakage that can lead to short stroking. Staked screws, parkerized exterior with hardened interior for bolt and cam pin.