- Geissele Super Dynamic 3-Gun Trigger Upgrade for a trigger that delivers shortened pull length, crisp break, and lightning-quick reset. Designed specifically for competition shooters, these Rifle Triggers from Geissele enable rapid target engagement and super quick follow-up shots. Using the Geissele Super Dynamic 3-Gun Replacement Trigger feels like a hybrid trigger pull that is a cross between a single-stage and a traditional two-stage trigger, while retaining the safety and reliability of a two-stage combat trigger. Customizing with a Geissele Super Dynamic 3-Gun SD-3G Trigger will transform your shooting experience.