- The Geissele 2 Stage (G2S) was designed to be a high quality, cost effective alternative to the SSA. It is a 4.5 lb. non-adjustable precision combat two-stage trigger and allows precise and accurate trigger control. The G2S is manufactured from the same tool steel as the SSA. Visually, from the outside of the weapon there is no difference from the SSA and the feel and reliability is the same. The G2S however has a different way of holding the hammer pin in place. There are no laser markings, and the parts are only spot-checked for MP. The G2S Trigger will lighten the trigger pull relative to a standard trigger. This lightened trigger pull will make the firearm easier to discharge.