Perun Hybrid V3 MosfetPerun Hyrbid Mosfet for V3 Gearbox Adjustable trigger sensitivity The trigger can be set to 5 sensitivity levels, ranging from very short pull needed to fire a shot, to a very long one. No modification to the trigger or the gearbox is needed and the trigger sensitivity change is possible even in the field. Independently programmed firing modes Program the firing modes any way you like, setting safe, semi, burst or auto on both selector positions.