Geissele Automatics 05-145 G2S Trigger AR Style Mil-Spec Steel Black Oxide 4.5 Lbs The G2S Is a 4.5Lb. Non-Adjustable Two-Stage Combat Trigger That Allows Precise And Accurate Trigger Control. Type: Trigger Model: AR Style Size: Mil-Spec Material: Steel Trigger: Two Stage Finish: Black Oxide