Whether or not you're looking to build a mil-spec reproduction or you're just waiting on an upgraded trigger, adding a mil-spec trigger kit to your AR-15 build is a must. The CMMG Mil-Spec Trigger Kit includes all of the components necessary to add an M16-style, semi-auto trigger to your build. Each CMMG Mil-Spec Trigger Kit includes a hammer assembly, hammer spring, trigger, trigger disconnect spring, trigger spring, disconnect and a disconnect spring.