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Fox Airsoft offers a 30 day warranty and return policy.

What's Included?

  • Perun AB++ MOSFET
  • Programming Card


  • 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

Technical Specifications:

  • Model Number: PERUN-AB-XX-UW
  • Battery Type: 7.4v, 11.1v, 14.8v
  • Battery Connector: Deans


Q: What is the Perun AB++ MOSFET, and what is its primary function in airsoft replicas?

A: The Perun AB++ is an on-wire MOSFET designed for airsoft guns. Its primary function is to channel power from the battery to the motor through a high-power transistor, replacing mechanical switches. This enhances the reliability and performance of the airsoft replica.

Q: How does the Perun AB++ MOSFET enhance the functionality of airsoft replicas?

A: The Perun AB++ adds several features to airsoft replicas. These include electronic burst for ammo conservation and realism, active brake to prevent spring compression or motor overspin, precocking for quicker trigger response, rate of fire reduction, DMR mode for game rule compliance, low battery voltage alarm, and a diagnostic system for troubleshooting.

Q: What is the installation process like for the Perun AB++ MOSFET?

A: Installing the Perun AB++ MOSFET involves a few simple soldering joints. Its universal wiring design makes it compatible with any airsoft replica, facilitating easy installation.

Q: Can you explain the precocking feature of the Perun AB++ MOSFET and its benefits?

A: The precocking feature of the Perun AB++ keeps the piston in the rear position with the spring compressed after each shot, ensuring immediate firing on the next trigger pull. This is especially beneficial in close-quarter battles for faster trigger response. Releasing the spring is done by pulling the trigger while holding the button on the unit.

Q: How does the user interface with the Perun AB++ MOSFET for programming and adjustments?

A: Users program and adjust the Perun AB++ MOSFET settings using the trigger and a button on the device. The process involves quick and easily memorable sequences, supported by sound signals and a multicolor LED diode. This allows for adjustments even during gameplay.

Q: What are the power and compatibility specifications of the Perun AB++ MOSFET?

A: The Perun AB++ MOSFET is compatible with any battery from 7V to 17V and can be used in extreme setups without spring rating limitations. This makes it highly versatile for different airsoft replicas and game styles.

About the Perun AB++ MOSFET

The Perun AB++ MOSFET is a revolutionary component in the world of airsoft, bringing a high level of innovation and functionality to airsoft replicas. As an on-wire MOSFET, its primary role is to efficiently channel power from the battery to the motor using a specialized high-power transistor. This advanced approach replaces traditional mechanical switches, significantly enhancing the reliability and overall performance of airsoft guns. The integration of the Perun AB++ into an airsoft replica marks a significant step forward in technological advancement within the sport.

One of the most notable enhancements that the Perun AB++ MOSFET brings to airsoft guns is its array of features aimed at improving gameplay experience and realism. The electronic burst mode is a standout feature, allowing players to switch their guns from automatic to a controlled burst mode. This not only conserves ammunition but also adds a realistic aspect to engagements. The active brake feature is another innovative addition, effectively stopping the motor after each shot to prevent issues like spring compression or motor overspin, common in high-rate-of-fire replicas. Additionally, the precocking function ensures that the piston is held in the rear position with the spring already compressed after each shot, resulting in a significantly faster trigger response, a critical factor in close-quarter battle situations.

Installation of the Perun AB++ MOSFET is designed to be user-friendly, requiring only a few simple soldering joints thanks to its universal wiring. This design ensures that it can be used in any airsoft replica, making it a versatile choice for players looking to upgrade their equipment. Furthermore, the ease of programming and adjusting settings on the Perun AB++ is a significant advantage. Users can quickly and easily adjust settings using a combination of the trigger and a button on the device, with sound signals and a multicolor LED diode aiding in the process. This feature is particularly useful in dynamic game situations where quick adjustments might be needed.

In terms of power and compatibility, the Perun AB++ MOSFET stands out with its wide range of compatibility with batteries ranging from 7V to 17V. It is also suitable for use in extreme setups, not restricting players based on the spring rating. This flexibility ensures that the MOSFET can be used across various types of airsoft replicas, catering to different styles and preferences in gameplay. The addition of features like the DMR mode, which introduces intervals between semi-automatic shots to comply with specific game rules, and the low battery voltage alarm for Li-Po and Li-Ion batteries, further enhances its utility. The electronic fuse and diagnostic system also provide an extra layer of safety and ease in troubleshooting, making the Perun AB++ MOSFET a comprehensive upgrade for any airsoft enthusiast looking to enhance their gameplay experience.



Fox Airsoft offers a 30 day warranty and return policy which you can read more about here. The Manufacturer also offers a 12 Month warranty for this product. 


Product Manual

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