CMCs critical sear engagement surfaces have a proprietary machining process that renders superior surface finish and dimensional control. As compared to their competition the techniques used to establish a 1-2 RMS surface finish as opposed to EDMing which leaves a pitty 32 RMS compared to a mirror which is 0 RMS. 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.