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: Lightning Bow PIN SIZE: Mil-Spec The SSA-E X with Lightning Bow trigger features a Nanocoated wide body trigger and Nanocoated hammer, with a special chrome nitride disconnect that combines advancements in coating design to bring about the next evolution of the venerable SSA-E. These coatings dramatically enhance wear and corrosion resistance and keep the trigger running smooth and breaking clean even after heavy use with minimal lubrication.? The SSA-E X with Lightning Bow trigger is a non-adjustable trigger, with pull weights that result in a trigger with a smooth, light first stage take-up and a crisp, candy cane-like second stage break. The SSA-E X 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. 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.