This kit consists of Volquartsen's target hammer (including shims and bushings), hammer spring, target disconnector, target sear and target trigger (including polished plunger and spring) with overtravel adjustment. Also included is a recoil buffer to reduce wear on the action and bolt. The HP Action Kit will give the shooter one of the most crisp, clean trigger pulls available. Reduces trigger pull down to approximately 2.25 - 2.5lbs. HP Action Kit Plus features all of this and adds Volquartsen's Extended Magazine Release and Auto Bolt Release. Please note this bolt release is only compatible with Volquartsen and Ruger factory bolts and trigger guards, including the BX-Trigger. It may not work correctly with other manufacturers' parts.