Ruger Mk II, Mk III and 22/45 Accurizing Kit by Volquartsen Black/Black

Volquartsen Mk II, Mk III and 22/45 Accurizing Kit Black/Black
Also Converts Mk III Pistols to Eliminate the Magazine Disconnect
  Features a Black Extended Bolt Release and Black Trigger. Complete drop-in kit for the Ruger MKII and MKII 22/45 to provide a crisp, clean 2.25lb trigger pull (pull may vary slightly due to factory frame variances). The kit includes an extended bolt release (extended bolt release is not used when installing in a 22/45), target hammer w/bushing, target sear, target trigger w/over travel screw, return trigger plunger spring and polished plunger. No stoning required. Final trigger pull may vary slightly due to factory frame variances. 
  Please Note: The MKII Kits include a Volquartsen MKII Hammer Bushing and Target Hammer. Do not attempt to use any other after market hammer bushing with these kits.
  Ruger Mk III Owners: If you want to eliminate the Mk III magazine disconnect, the Mk II bushing and target hammer in this kit will allow you to remove your Mk III magazine disconnect lever and spring. Order this kit to convert the Mk III.