Hiperfire X2S Mod-3, Semi Drop-In Trigger Kit, 2-Stage, Fits AR15/AR10/PCC/MPX, Black Color, Black Nitride Finish, Flat Trigger, 1st Stage 2-3LB, 2nd Stage 1.5LB, Overall 3.5-4.5LB X2SM3 HIPERFIRE(R) is simply unmatched in performance and reliability. They have broken all of the standards in single-stage AR triggers with the HIPERTOUCH(R) family" and now they have done the same in the new X2S(TM) family of two-stage triggers. Whether you shoot competitively" train to defend yourself and your family" or you simply want to enjoy shooting out on the range" ensuring your rifle functions properly every time" without fail" is important. These new two-stage triggers feature the same technology that HIPERFIRE has become known for. Radical Sear Mechanics(TM)" Cam-Over Toggle Engine(TM)" Soft Start Lock-Up(TM)" Tactile Weightless Break(TM)" user adjustable pull weights" mil-grade components" and precision manufacturing processes come together to make one of the most robust two-stage triggers available today. The MOD-3 design has a shorter first stage than MOD-1 for a faster first stage prep. It shares the same sear geometry and performance as its MOD-2 counterpart" but has a flat trigger bow with their patented HIPERSHOE(R) and an upgraded Black Nitride coating. This trigger can be used with or without the included HIPERSHOE.