CMC is the original manufacturer of the Drop-in Trigger Group for the AR-15/10 rifle since 2003. CMC's critical sear engagement surfaces have a proprietary machining process that renders superior surface finish and dimensional control. CMC's innovative, self-contained and easy-to-install AR-15 trigger groups have been completely re-tooled to maximize production capacities, incorporate new design enhancements and reduce cost. Other Features: Single Stage Match TriggerUltra-crisp trigger with no feel of creep prior to hammer releaseThe trigger has a glass-smooth break with no feel of grittinessFits MIL-SPEC AR-15 and AR-10 style riflesTotally self-contained one-piece assembly#html-body