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Perun AB++ Airsoft MOSFET w/ Burst and Active Braking

ID: 24300 (MOSFET-PR-AB++)
5.0 stars, based on 6 reviews
Perun AB++ Airsoft MOSFET w/ Burst and Active Braking
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The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.


  • Electronic burst
  • Active brake with adjustable braking power
  • Precocking with spring release feature
  • Rate of fire reduction
  • DMR mode
  • Low battery voltage alarm
  • Programming supported with a multicolor LED diode
  • Diagnostic system & electronic resettable fuse
The Perun AB++ is an on-wire MOSFET, channeling the power from the battery to the motor through a specialized high-power transistor, instead of delicate mechanical switches. This design increases the reliability and performance of your Airsoft gun and also enhances it by adding many new, useful features.

Works with 7.4V, 11.1V and 14.8V batteries. Comes almost fully pre-wired, with only few easy soldering joints needed to install the MOSFET.

Electronic burst: Change auto to an electronically controlled burst to save your ammo and increase realism!

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, the 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 while simultaneously holding button on the unit. A shot will be fired, with no precocking and fully braked.

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.

DMR mode: Introduces intervals between semiautomatic shots to comply with DMR rules on some fields.

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.

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 if a short circuit or blocked motor is detected.

Manufacturer: Perun


Permissible Battery Voltage: 7V-17V
Dimensions: 32mm x 12mm x 6mm (not including wiring)

About Perun

Perun was established in 2016 with the aim of designing and manufacturing MOSFET devices and other parts for AEGs. After years of designing and testing, we offer you products that will work reliably even in most extreme situations and enhance the capabilities of your replicas.All of our design work and most of the manufacturing is done in the European Union state of Poland. That allows us to reach our main goal - keep the highest quality possible. We are in constant contact with players, airsoft techs, shops and consult with them to ensure that our products satisfy their needs.

6 Customer Reviews

(Write a review)

by Omar B. on 01/30/2023
"This mosfet is fabulous. Definitely in all in one package without having to replace the entire trigger. I installed this in my Army L85A1, that relies on a circuit break/reversal for precocking. I actually had a Gate nanoasr and removed the factory break wire before but in semi that would leave my piston stopped like halfway thru the cycle (half working precocking). But with this I activated level 1 active brake and oh man what an improvement. I can shoot semi much faster than before without the trigger locking up and it precocks like it did from factory in addition to a notable increase in response. Precocking feature in the mosfet wasnt needed. I tried using burst but it was being probably due to the mosfet timer being calibrated for a standard 15 tooth piston. Im sure this would do wonders on a V2. For now I am very satisfied to have this over Gate's AB mosfet due to the diversity and strength of functions. To install in a Army/G&G L85 you need to pop out the trigger assembly and desolder the 2 positives there and the 1 positive from the factory active braking from the top cover. Then measure out the wire and have the signal wire on the bottom contact and have the positive go from mosfet -_ top trigger -_ motor. The negative can go straight from mosfet to motor. Highly recommended for any standard 15 tooth piston gearbox or 19 tooth even but with less function
by Ilan M. on 09/30/2022
"This is a good little mosfet. I adapted this for a Snow Wolf AUG A3 after watching a forum on internet and it actually works very well, of course, since I changed the whole wiring of the gearbox it requires a lot of soldering but is not that complicated, just requires time, and let me tell you, paired with an ASG 18K motor and M150 spring this thing sounds really great and the funtions works great as well!
by alfred l. on 01/23/2022
"Great mosfet and great value compared to others. improve my trigger response Easy to program. Features are good enough for what I needed. There is some soldering that is needed but is not that bad. just needed to solder to both trigger contacts and terminate motor connector. The positive lead to motor is a little short for my application.

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