Fusion Firearms match grade trigger upgrade group. This Trigger group comes with all the necessary parts to upgrade your 1911 Colt style pistol to a high quality modern style trigger group with a Black "K" Hole Trigger and HI (High Impact) Hammer. Included in this kit is the Match Grade Strut, Disconnector, Sear, Hammer, Adjustable light-weight, aluminum alloy trigger with adjustable bow, Hammer Pin, Sear Pin, Strut Pin, Match Sear Spring, reduced poundage match hammer spring and wrench for the trigger adjustment. All applicable parts are manufactured to today's highest tolerance from Bar-stock, heat-treated and precision machined. The sear tip angles are already ground and prepped for you and the hammer engagement faces prepped. Many folks will use our Fine and Extra-fine gunsmithing hones to complete the dressing to their liking. The Hammers are Forged Stainless Steel alloy, CNC machined & Heat-treated, NO-MIM. Will work for most all 1911 style Colt Pistols and Clones in Officers, Commander, Full 5 inch government, and 6 inch Long-Slides. If you have a mil spec grip safety, you will need to use our mil spec style hammers, make hammer clearance in your mil spec style grip safety, or change your grip safety to one of our Beavertail styles. Made in the USA.