Ready to drop in bolt assembly, machined to strict tolerances, improves reliability and accuracy. Case hardened to prevent cracking, with extra smooth bearing surfaces for reliable cycling. Unique, round, titanium firing pin, encased in the bolt to prevent binding and misfires, plus helps decrease locktime. EDM machined, hardened extractor ensures positive extraction. Features easily interchangeable bolt handle. Includes recoil spring and rod for easier installation.