Failzero Ar-15 Nickel Boron Bolt Carrier Assembly

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Separately available Carrier comes with gas key installed and staked. Bolt includes extractor, ejector, and gas rings installed. Add the firing pin of your choice. Mfg: Failzero SPECS: Heat-hardened carbon steel, EXO-treated Nickel Boron finish. Fits mil-spec AR-15 upper receiver. Carrier does not have provision for auto sear trip.