Semi-two-stage trigger unit that is easily user installed in any AR pattern rifle. Exclusive Wilson Combat engineering enables a durable, sub-4lb, ultra-crisp trigger pull without any fine tuning or adjustment. Abbreviated initial stage establishes ample sear engagement for reliable and safe "Bullet Proof" operation in extreme tactical environments. Reduced, positive trigger reset guarantees a quick follow up shot on target. The unique hammer geometry enhances reliable ignition with military and surplus ammunition of all types while a secondary rescue sear allows the two-stage TTU to meet or exceed military specifications for drop safety. Pre-assembled, CNC machined aluminum trigger housing contains Stainless steel trigger and springs in conjunction with tool steel action parts for trouble-free installation and long lasting performance. Designed and extensively tested by shooters for shooters, the new Tactical Trigger Unit has raised the bar for drop-in AR triggers.