Volquartsen Bolt Tune Up Kit Ruger Mark I, Mark II, Mark III, Mark IV

Fits RugerA(R) MKI, MKII(TM), & MKIII(TM) including 22/45(TM). Firing pin sold with extractor or available separately. Firing Pin EDM machined from A2 tool steel Minimizes/eliminates light hits Firing pin strike face is surface ground Firing pin is .004" wider than factory pin, new width helps eliminate side-to-side movement Hardened to RC56-58 to prevent deformation Extractor EDM machined from A2 tool steel Allows for exact tolerances Will not lose edge under impact Precise hook point is hardened to RC58-60 Mfg: Volquartsen