Perun ETU MOSFET for P90P90 Perun for P90 replaces trigger bar and mechanical contacts in your P90 replica and provides lots of useful features. Magnetic sensors coupled with a magnet installed directly on the trigger, allow to remove the bar that connects trigger with the gearbox, making trigger pull much smoother. Proprietary cut off lever (comes with the mosfet) works with an optical sensor to eliminate all problems with single fire function. Replicas compatible with this