Be the first to review “Ruger Mark IV Competition 22 LR Single Action Semi-Auto Pistol, 6.88″ Slab-Sided Bull Barrel Barrel, Satin Stainless Finish – Ruger 40112” Cancel reply. You must be logged in to post a review. Dec 31, 2019 · Finally have my new Ruger Mark IV 10" finished, well at least for the most part. I hate the Volquartsen scope rail on it. I have the Ruger factory rail coming. I should get it Saturday. But here she is for now. I have all the Volquartsen innards in her along with the Competition Target Grips and a Simmons Tubed type Red Dot which I prefer. The Ruger Mark III is a .22 Long Rifle semi-automatic pistol manufactured by Sturm, Ruger & Company. It replaced the MK II in 2004. The Mark III was succeeded by the MK IV, with production of the Mark III ending on December 8, 2016. Changes from the Mark II. Addition of a visible loaded chamber indicator on the left side.

Ruger’s Mark IV features a simple, one-button takedown for quick and easy field-stripping and proper chamber to muzzle cleaning. The recessed button in the back of the frame allows the upper receiver to tilt up and off of the grip frame without the use of tools. New Additions to Ruger Mark IV Family-Ruger is adding three new models to the growing Mark IV family of rimfire pistols, which include a bronze anodized Mark IV Lite model, as well as Mark IV Hunter and Target models that feature wrap-around target grips.