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Complete .308 Mk3 bolt carrier group - includes a complete bolt, properly staked gas key, firing pin, cam pin and firing pin retaining pin. Bolt is precision machined from 9310 steel, and the carrier from 8620. Hardened extractor is S7 tool steel.
Bolt: 9310 Steel, Phosphate Finish
Carrier: 8620 Steel, Chrome Lined, Phosphate Finish
Extractor: S7 Tool Steel, Phosphate Finish