Perun – AUG Mosfet


In stock



General, brief description

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 manufactured by: Tokyo Marui, G&G, JG, Well, CYMA, Classic Army.


  • Trigger movement is detected directly on the trigger, with no need to keep the trigger bar
  • Adjustable trigger sensitivity
  • Active brake with adjustable braking power
  • Precocking (with spring release feature)
  • Rate of fire reduction
  • Low battery voltage alarm
  • Programming supported with a multicolor LED diode
  • DSG mode
  • Diagnostic system
  • Electronic resettable fuse



Feature description

Adjustable trigger sensitivity – The trigger can be set to 5 sensitivity levels for both first and second trigger stage, ranging from short pull needed to fire a shot, to a long one. No modification to the trigger or the gearbox is needed and the trigger sensitivity change is possible even in the field.

Selectable firing modes – User can choose firing modes available after short or long pull of the trigger: SEMI ONLY, BINARY, SEMI-AUTO, SEMI-BURST, BURST-AUTO.

Active brake – active brake stops the motor after each shot preventing spring compression or in case of replicas with high rate of fire, overspin (double shot problem).

Precocking – Fast trigger response can be a matter of victory or defeat, especially in CQB situations. With precocking enabled, piston will remain in rear position after each shot with the spring already compressed, ensuring that next shot will be fired immediately after you pull the trigger. To release the spring after using precocking, pull the trigger and hold it for 2 seconds, after which a second shot will be fired, this time with no precocking and fully braked.

Binary trigger – Allows for easy double shots in semi-automatic setting. After enabling this mode, if semi-automatic fire is set, shots will be fired not only when the trigger is pulled, but also when it is released.

Rate of fire reduction – Reduce the rate of fire in automatic or burst fire to save ammo or make the replica shoot in a more realistic fashion.

Low battery voltage alarm – Dedicated for Li-Po and Li-Ion batteries. Should the battery voltage fall to a dangerously low level, user will be notified by short sound signals that are repeated every minute. This may also be freely switched on and off.

DSG – a sector gear detection mode specially prepared to work with dual sector gears.

Diagnostic system – Constantly monitors the replica and the mosfet itself. In case of any problems, immediately lets you know what it might be, making troubleshooting much easier.

Electronic fuse – Will save your replica and battery in case of a major malfunction. It will automatically disconnect the battery when a short circuit or blocked motor is detected.


Programming of all the settings is done solely by using a button and multicolor LED diode mounted in the battery compartment and the trigger. That allows changing the settings in any moment, in a matter of seconds, even under enemy fire. All settings are set independently for each selector position, so you can program the mosfet exactly the way you want, for example semi on semi and binary trigger on auto.

Perun for AUG works without problems with any battery from, 7 V to 17 V. It can also be used with most extreme setups.


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