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Perun AB is an electronic circuit that protects mechanical switches in your replica. When installed, high currents used to accelerate the motor are not directed through contacts, but through the specialized MOSFET transistor. This not only increases reliability but also has a positive effect on the rate of fire as MOSFETs have much lower resistance than mechanical contacts.

Additionally, Perun AB allows you to enable or disable active brake mode (AB), which stops the motor as soon as gearbox cycle ends. This helps by reducing spring wear.

For Li-Po battery users Perun AB offers Li-Po protection mode that will sound an alarm if battery voltage falls to dangerously low levels.

Warranty – 1 year

 Allowed battery types:

Li-Po, 2 to 4 cells (7.4V to 14.8V)

NiMH/NiCd, 8 to 10 cells (9.6 to 12V)

Li-Fe, 3 cells (9.9 V)


Perun AB, a microcontroller-steered mosfet device with AB and Li-Po protection which can be turned on or off. It is very rugged and powerful, yet compact. We do not specify maximum spring or ROF it can be used with, as it can withstand any AEG configuration. Microcontroller guarantees resistance to contact bouncing.

You can see a nice demonstration of the sheer power in this beast here.

ATTENTION! The device must never be run without a fuse.

Fitting a MOSFET requires accessing the gearbox and a small amount of soldering. If you have any doubts about your ability to do this, we offer a fitting service, the cost of which covers uplift and delivery as well as the cost of the work itself. If you decide to fit the unit yourself, Airsoft World Ltd accept no responsibility for any damage to the unit or your gun. Please also be aware that opening your rifle to fit this device may negate any warranty you have remaining from the supplier.

Only MOSFETs fitted by an authorised airsoft technician will carry any warranty as otherwisae we cannot guarantee the MOSFET was installed correctly.

The Perun V2 allows you to retain the mechanicalsafety for increased realism.

Thanks to use of exceptionally efficient MOSFETs, the device can be used in replicas with main springs up to M170. The maximum rate of fire is 40 RPS.

The Perun AB has active braking allowing you to stop the motor after each shot. In case of double shot problem in replicas with high rates of fire, active braking will be an effective solution. It can also prevent unnecessary compression of the main spring and tappet plate springs by keeping the piston fully forward between shots. Active braking can be switched on or off at any time in few seconds.

Battery protection mode is dedicated to Li-Po batteries. Should the battery voltage fall to a dangerously low level, the user will be notified by short sound signals repeated every 30 seconds. This may also be freely switched on and off.

The integral part of the Perun AB is a ready for installation unit using low-resistance wiring based on 16 AWG wires (compliant with American MIL-STD-681 military standard). In spite of the relatively heavy gauge, the wires will fit into every gearbox thanks to both thin and very durable polyolefin-fluoropolymer insulation (the external wire diameter is 1.91mm).

Weight (Kg) 0.1000
Manufacturer Perun
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Important Information


All images, product contents and specifications listed are based on checks performed when a product is first listed and may differ due to changes over time made by the manufacturer. This includes package contents in regards to any 'extras' provided e.g. Sample BBs.

Items used in images to promote the main item (Holsters, Camo, etc) are not supplied unless listed in the Specification tab under 'Extras'. This includes attached rails, grips, scopes, suppressors etc. If no extras are listed, please assume none are supplied.

Unless otherwise stated in the Specification tab, Battery and Chargers are not suppplied.

Where supplied, Chinese batteries and chargers are warrantied to be not DOA (Dead on Arrival) only. We always recommend swapping out to a better quality battery and charger at the earliest opportunity.

Custom Painted products (Two-Tone) are non-refundable as these are painted to order. 

Unless otherwise stated, all products are sold singly.



Any figures used are based on tests performed on the products when they are first listed. These can vary due to changes by the manufacturer, gas pressure, gas used and a number of other factors. All figures should be treated as an approximate guide and used for reference only. 

All listed FPS are +/- 5% due to differences from rifle to rifle. If you require a guaranteed FPS, please add an upgrade/downgrade option on to your product (this may cost extra).

No airsoft AEG is warrantied for use with an 11.1v LiPo or higher voltage battery at UK velocities (373fps or lower) unless specifically recommended on the product itself. Use of higher voltage batteries can cause failures and will negate any warranty implied or otherwise.


Wearable Items

We cannot offer a refund or exchange on articles bought and worn skirmishing that you subsequently feel aren't suitable. If in doubt, try the kit on in your house BEFORE you play as soiled items will not be refunded for this reason. Clothing worn next to the skin (Long Johns, Socks etc) cannot be returned for refund if worn at all. For sizing, simply place them next to you before physically putting them on. Would you like to wear someone elses soiled socks?


We cannot offer an exchange on pyrotechnic devices due to device failure or items that have been stored for long periods of time. We are unable to guarantee that the pyrotechnic device has been stored in a moisture free environment or used correctly in accordance with the manufacturers guidelines.

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