The X-Treme AR-15 triggers are a 2-stage design fully machined from alloy tool steel and heat treated (not case hardened). Each trigger is adjustable for 1st and 2nd stage pull and sear adjustment. The lock time is exceptionally fast (approximately 4 milliseconds) and installation takes just a few minutes with no rifle modification. All trigger parts receive a mil-spec black satin coating for corrosion resistance. Trigger includes a lifetime guarantee to the original buyer.
Sinclair, Issue:4A, Page:256