The MMR Pro Match Trigger is factory-set at a pull weight of 4lbs and offers a crisp, creep-free break and user-adjustable overtravel.Designed in conjunction with legendary champion Jerry Miculek, the JM Pro Match Trigger is a great replacement trigger for stock units. This drop-in trigger is factory-set at a pull weight of 4 pounds, and offers a crisp, creep-free break and user-adjustable over travel. Fits AR-15 s and AR10s with 0.154 inches trigger and hammer pin holes.