CMC'S CURVED TRIGGER BOW - CMC's AR-15/10 patented "Signature" is for the shooter who wants a traditional feel. The Curved Trigger has an exceptionally smooth feel and ultra-clean break. With excellent lock time and lighting fast positive reset, the CMC Curved Trigger is unsurpassed by any other fire control group. CMC Triggers Complete Lower Receiver Parts Kit for AR-15 is a great addition to your AR15 build. From amateur gun builder to seasoned expert gunsmith, this lower parts kit is for you.