Wilson Combat TRTTUM2 Tactical Trigger Unit Two-Stage Two-Stage Curved Trigger with 4-4.50 lbs Draw Weight for AR-15

The Wilson Combat TRTTUM2 Tactical Trigger Unit Two-Stage curved trigger for AR-15. Draw weight 4–4.5 lb, drop-in housing pre-assembled with an H13 heat-treated trigger, hammer, and sear, plus a stainless steel spring for easy installation. Caliber-neutral for AR pattern lowers with standard GI trigger pins of .154 inches. Compatibility notes: not compatible with Colt rifles manufactured 1991–2009 (trigger pin size typically .169 inches) or Colt rifles with pinned-in sear blocks; not compatible with Bushmaster ACR. MR556 and other ARs with firing pin safety mechanisms can use TTU-3G or TTU-M2.