500 Series barrels fit the Ruger MK I, MK II, and 22/45 models. Barrels are completely turned, threaded, chambered, crowned, polished, and finished. They are made from Walther premium blanks, and are available in chrome-moly or stainless steel. They are offered with or without a replaceable, serrated-ramp, undercut, partridge, front sight. Barrel lengths offered are 5-1/2" and 6-1/4". The 6-1/4" model has a built in compensator. Installation requires lathe work.

(Part CLK-510) When used in conjunction with a trigger job, this trigger allows for a sharper, crisper pull. It removes the trigger sideplay that exists with a factory trigger. It can be fitted to Mk I, Mk II, MkIII or 22/45 Ruger .22 semi-auto pistols. The trigger features a micro-adjustable overtravel stop and a wide arc so the trigger finger will not drag on the trigger guard. A sharp serrated face with a wide, flat surface allows for finer finger pressure control. Some fitting is required.

(Part 515) Oversized sear pin and hammer bushing provide closer tolerances and allow for lighter, more consistent trigger job. These parts are included with all Mk I and Mk II trigger jobs.

(Part 517) Not pictured ~ Oversized Hammer Bushing and Sear Pin that we use on the Ruger 22/45 to obtain the best possible trigger job.

(Parts 520) Lightweight, anodized base machined from a solid block of aluminum has the same hole pattern as the Ruger Slab Side factory base. It accepts most Weaver style rings. Comes with 3 mounting screws. Available in BLACK or SILVER color. No need to remove your sight. You can utilize your iron sights with the base installed on the gun.