Features of this trigger includes a Single Stage Match Trigger, Available Pull Weights: 3.5, Ultra-crisp trigger with no feel of creep prior to hammer release, The trigger has a glass-smooth break with no feel of grittiness, Minimal lock time is designed into the assembly using controlled hammer weight and balance activated by a rocket wire hammer spring, assuring repeatable function with either commercial or military grade ammunition, Trigger pull is factory pre-set and not user adjustable, Positive trigger reset allows a quick follow up shot on target, Hand assembled, and hand tested, Totally self-contained one-piece assembly, Comes with CMC Anti-Walk Pin Set, Fits MIL-SPEC AR-15 and AR-10 style rifles, Made from 8620 Alloy Steel and S7 Tool Steel with machined tolerances of +/– .001", and is Easy to install