This AR-10/AR-15 trigger is a finely-tuned semi-automatic only version of the SSF trigger. Presently used in the U.S. Special Operations community. The two stage combat trigger has a standard Mil-Spec pin and an M4 curved trigger bow. Total pull weight is 3.5 pounds (1st stage 2.3 pounds and 2nd stage 1.2 pounds). Manufactured from tool steel. MADE IN THE U.S.A.