Volquartsen VC2AK-S Accurizing Kitfor Ruger Mark II, III and 22/45, Silver/Black- Drop In Target Grade Accurizing Kit with silver extended bolt release and black trigger 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 with pre/over travel screws, return trigger plunger spring and polished plunger. No stoning required. Final trigger pull may vary slightly due to factory frame variances.