Developed specifically for use in pistol-caliber carbines chambered in 9 mm Luger and .45 ACP, the Elftmann Tactical AR-9 Trigger is nonetheless compatible with all mil-spec AR-platform rifles and the SIG Sauer MPX. A drop-in trigger group with a lightweight aircraft-grade aluminum housing and internal parts that are wire EDM machined from hardened A2 steel, the AR-9 Trigger features a crisp, single-stage break that can be user-adjusted from between 2 lbs., 12 ozs., to 4 lbs. without removing the unit from the lower receiver. Variants with either straight or curved trigger shoes are offered, all retailing for $259. For more information, please visitelftactical.com.