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1 week ago
PSA 5.56 Nitride MPI Full-Auto Bolt Carrier Group - $149.99 Bolt Finish: Nitride Bolt Steel: 9310 Profile: Full Auto Profile Gas Key: Grade 8 Hardened Fasteners, Staked per MilSpec Bolt is Magnetic Particle Inspected (MPI) The PSA Freedom Nitride BCG is made with a 9310 bolt with a