A complete, High-Quality Trigger System for unique operating environments, the Geissele 2 Stage (G2S) Trigger, semi-auto-only, drops into your AR-15 to give the performance and reliability of Geissele quality triggers at an economical price. Features a 4½ lb. total pull weight, non-adjustable sear engagement, and a 2½ lb. first stage. Made of fine tool steel with wire-EDM cut sear engagement surfaces, and a unique spring clip to retain the hammer pin. A spare hammer pin retainer is included, as well as a container of lubricant. Note that this trigger will not fit “Large Pin” Colt receivers. How to Install