These kits take away the mystery of fine tuning the Ruger 10/22® action and result in a superb trigger pull and super fast lock time. The 10/22® Hammer Tune Kit produces a lighter trigger pull with a faster lock time. The sear engagement surfaces are precision ground and vapor honed. The kit includes a new hammer, extra power hammer spring, two .004" shims and a new trigger return spring. The 10/22® Competition Sear Kit lightens the trigger pull and smooths the trigger return. Hand stoned engagement surfaces. Includes a new sear, extra power sear spring, and two .004" trigger shims. This Hammer and Sear package produces a trigger pull of 2.75 lbs +/- 4 oz. See many more products for your 10/22 at our Ruger 10/22 Main Menu!