Perun ETU MOSFET for AUGAUG Perun for AUG mechanical contacts in your AUG 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. Optical detection of the sector gear position ensures reliable single fire function. Only replicas in Tokyo Marui standard are compatible with this mosfet, among which are those