Single Stage Trigger; Ultra-crisp trigger with no feel of creep prior to hammer release; The trigger has a glass-smooth break with no feel of grittiness; 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; Made from 8620 Alloy Steel and S7 Tool Steel with machined tolerances of +/- .001"; Ambidextrous magazine release; Enhanced Bolt Hold Open Button