The Powder River Precision XD/XDM Drop In Trigger Kit contains their famous striker safety lever, which removes the long trigger pre-travel on XD triggers. The kit includes reduced power; trigger spring, sear spring, striker safety spring, and striker spring. These reduced power springs allow for a lowered pull weight. The PRP Drop in Trigger is constructed of lightweight polymer that assists in speeding up trigger reset. It also has an integral over travel stop on the back of the trigger. This integral stop removes added stress on the trigger bar that is present with other over travel stop methods. When installed, this kit provides a short, crisp trigger pull (3.5-4.5lbs) with a fast res Mfg: Powder River Precision Inc SPECS: Polymer trigger. Reduced power trigger, striker and strike springs. 3.5-4.5lbs pull weight. NOTE: The XD Sub Compact (100-009-750) is for 9mm/.40 only. Does NOT fit XDS. Use 100-009-749 for all the XD .45 models EXCEPT the .45 cal thumb safety model.