Wilson Combat TTU: AR-15 Drop In Trigger

From Wilson Combat:

TR-TTU – Tactical Trigger Unit® – The TTU® is without doubt the world’s most advanced DROP-IN trigger unit. All parts are fully CNC machined from stainless steel and then melonite coated (think Glock slide) for maximum durability. Assembled with stainless steel springs in a hard anodized aluminum housing utilizing standard pins. The trigger pull is preset at a crisp 3 ½ # to 3 ¾ #.