Perun Mosfet for AUGPerun for AUG Magnetic sensors coupled with magnet included, installed directly on the trigger, allows you to remove the bar that connects trigger with the gearbox, making the trigger pull much smoother. Optical detection of the sector gear position ensures reliable single fire function. (Cycle Detection) Only replicas in Tokyo Marui standard are compatible with this mosfet, among which are those manufactured by: Tokyo Marui, Classic Army, JG, ASG.