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.Finish: GoldModel: Drop-InMaterial: SteelHand: Ambidextrous