The CMC AR-15/AR-10 9mm PCC Single Stage Drop-In Trigger is the same Curved Trigger Bow shape you love for your large caliber rifles can now be successfully installed in your pistol caliber carbine without issue. Hammer dimensions have been modified to facilitate the 9mm platform and ensure success with each pull of the trigger. CMC Triggers 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 to the customer. It’s 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. Features- multiple trigger pull weights minimal lock time is designed into the assembly using controlled hammer weight and balance activated by a rocket wire hammer spring assuring repeatable function with either commercial or military grade ammunition trigger pull is factory pre-set and not user adjustable and a positive trigger reset allows a quick follow up shot on target. Comes with CMC Anti-Walk Pin Set