PLATFORM: AR15/AR10 TYPE: 2 Stage 1st STAGE WEIGHT RANGE: 2 - 2.5 lbs. 2nd STAGE WEIGHT RANGE: 0.9 - 1.3 lbs. TOTAL PULL WEIGHT RANGE: 2.9 - 3.8 lbs. ADJUSTABLE: No TRIGGER BOW TYPE: M4 Curved PIN SIZE: Mil-Spec Built on the chassis of the Geissele SSA, the Super Semi-Automatic Enhanced (SSA-E) provides enhanced trigger control and weapon accuracy while maintaining the robustness and reliability of our combat-proven two-stage trigger. The reduced first and second stage pull weights result in a trigger with a smooth, light first stage take-up and a crisp, candy cane-like second stage break. The SSA-E is ideal for use in precision Squad Designated Marksman type rifles where weapon accuracy and reliability are critical and a non-adjustable drop in trigger is desired. The Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger is a finely-tuned semi-automatic-only version of the full-auto, two stage combat trigger presently used in the U.S. Special Operations Community. Please note, these triggers are designed for mil-spec AR15/M4 carbine rifles. The AR15 triggers are not compatible with the Sig MPX/MCX weapons or Pistol Caliber Carbine AR15/M4 variants.?Using them in these platforms will void the warranty.