Volquartsen Target 22 Style Frame fits Ruger MKII and MKIIIA Complete Aluminum Lower Frame Replacement... Includes Volquartsen Accuracy System Internal PartsOur Volquartsen Custom Target Frame is CNC machined from aluminum alloy. Weighing only 7.1 oz, it is a complete frame with all internal parts including the Volquartsen Accuracy Kit: Extended Bolt Release, CNC machined Target Trigger, wire EDM cut Target Hammer and Target Sear, Titanium Disconnector, Built-in Spring Loaded Magazine Ejector and Extended Safety.Each Volquartsen Frame is shipped with a clean, crisp 2.25 lb trigger pull. And by popular request, the Mk III magazine disconnect has been eliminated. Fits Mk III Grips and Magazines - This is a complete frame. All you add to complete a gun is your Ruger Mk II, or Mk III barrel, bolt, and mainspring housing, Mk III compatible grips, and a Mk III compatible magazine. Does NOT fit 22/45 versions.