Enhanced Duty Trigger is a significant AR upgrade for MIL, LE/SWAT, personal utility; 2 user-adjustable trigger pull weights of 4.5+ and 5.5+ lbs; Single stage, semi-automatic; Radical Sear Mechanics: Medium Weights (4.5 and 5.5 lb. pulls), smooth, accurate; Heavy, SwingFast Hammer Head - Faster lock-up and more accurate; MIL++ Heavy Duty Hammer Springs. Very hard hammer strikes, high power touch off for ultimate accuracy; Curved Trigger with a Backbone; For standard AR lower receivers using small pins of 0.154-inch diameter; Hint of creep, slightly shorter travel to break from moment of reset; Crisp, clean trigger break. Best-In-Class fast/positive reset