Curved trigger; Designed for AR9s with mil-spec inner dimensions; calibers include 9MM. 40 S&W, and .45 ACP; With anti-walk pins; Enhanced hammer specifically designed to withstand PCCs' intense blowback systems; The feel and value of the bestselling Rave 140 AR trigger; Accuracy-improving crisp, clean 3.5lb trigger pull; Single stage with Quik-Klik reset you can feel; Easy and fast to install, no set screws to tighten down; NoWay Take-up - Most triggers allow a degree of movement before engaging the sear, but not with RISE triggers; Interior parts are S7 steel with heavy-hit hardening then black nitride finish; Contained in a precision-machined anodized housing made from a solid block of 6061 aluminum