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 Geissele’s combat-proven two-stage trigger. The SSA-E® with it's 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 Geissele’s full-auto, two stage combat trigger presently used in the U.S. Special Operations Community. SPECS Platform: AR15/AR10 Type: 2 Stage 1st Stage Weight Range: 2.0 - 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 Please note, our triggers are designed for mil-spec AR15/M4 carbine rifles. Our AR15 triggers are not compatible with the Sig MPX/MCX weapons or Pistol Caliber Carbine AR15/M4 variants.