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. CMC's AR-15 trigger groups have always yielded exceptional trigger pull dynamics for our tens of thousands of satisfied customers. Install the fully self-contained, ready-to-go trigger group, safety check, and it's done. For the best selection of Modern Sporting Rifle parts and accessories, shop Palmetto State Armory!