Volquartsen Mk III Accurizing Kit Complete drop-in kit for the Ruger MKIII and also MKIII 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, target sear, target trigger with over travel screw, return trigger plunger spring and polished plunger. No stoning required. Final trigger pull may vary slightly due to factory frame variances. Available in black or stainless finish. NOTE: This kit does NOT include a hammer bushing. If you want to eliminate the Mk III magazine disconnect feature, you need to order the MK II Accurizing Kit instead. The Mk II kit includes the Mk II hammer bushing and target hammer. These parts allow you to remove the Mk III magazine disconnect lever and spring.Be sure to visit our Volquartsen Home Page.