PRP Enhanced Bolt for 10/22 style rifles. This bolt is designed as an OEM bolt for our Rubicon .22lr receiver. We are offering it as an upgrade for other rifles available on the market. It is CNC machined out of 416 SS and through hardened. The sides are precision surface ground. The firing pin is cylindrical and is precision machined not to protrude past the breach-face, protecting your barrel from firing pin dings. Head space is properly set. Our PRPA(R) enhanced bolt comes complete with extractor, extractor spring and plunger, firing pin, firing pin rebound spring and firing pin retaining pin. Mfg: Powder River Precision Inc