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GATE Airsoft X-ASR 4th Generation Advanced MOSFET Unit - OEM

4.5 stars, based on 4 reviews
GATE Airsoft X-ASR 4th Generation Advanced MOSFET Unit - OEM
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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.


  • Mosfet targets the energy from the battery directly to the motor, bypassing the mechanical trigger contacts. In result, your rifle gains a higher rate of fire as well as faster trigger response. In addition, the trigger contacts are protected against burnout.
  • Debouncing, which provides full compatibility with micro-switches, ensures full resistance to contact bounce (vibration). You gain a bigger ROF, a faster trigger response and your MOSFET is less prone to overheating.
  • Automatic resettable Protection Against Reverse Polarity. This function protects the motor and MOSFET itself in the event of reverse polarity.
  • SMART FUSE, protects MOSFET in case of motor jam. The SMART FUSE prevents from overheating, overloading and over currenting.
  • The MOSFET is protected in case of short circuit of signal and motor wires. X-ASR does not require additional fuse in AEG installation.
  • BUILT-IN SELF-TEST 2 LED allows for quick troubleshooting
  • Due to its special conformal coating, X-ASR is resistant to heavy atmospheric conditions (Military Specification MIL-V-173C)
  • In case of too strong AEG configuration, the SMART FUSE will turn off the MOSFET in order to prevent overheating.
This is an OEM listing of the same GATE MOSFET Unit for our internal custom gun building / dealer use. This unit does not come with manuals or retail packaging.

We introduce the world first 4th generation mosfet. X-ASR is a highly reliable AEG controller. It has automatic resettable protection against battery reverse polarity, SMART FUSE and build-in self-test. It does not require additional fuse in AEG installation.

Manufacturer: GATE Airsoft


Dimensions: 40x16x6mm
Compatibility: Most gearboxes and Airsoft AEG platforms

Note: The X-ASR is designed for use with Low Torque Motors and springs UP TO M120 in strength.

About GATE

Since 2009, GATE company has been designing and producing the most innovative AEG Control Systems and MOSFETs. GATE has premises located in Cracow, Poland with products successfully entered global markets and are being sold in more than 30 countries.

4 Customer Reviews

(Write a review)

by William l. on 08/16/2021
"Works surprisingly well for the price, great to throw into a loaner gun etc.
by Ethan B. on 12/11/2020
"This is ridiculously easy to install. You don't even need to open the gearbox shell to get it working, just some soldering and electrical know-how and you're off to the races.

Threw this in my CM048 CYMA AK74 and was astounded to see how much my trigger response improved. It also has an LED for troubleshooting, such as bad motor terminals, battery voltage, and otherwise faulty electronics.

Easily would recommend
by Vitor C. on 01/23/2022
"Great mosfet. Price is decent, has all the basic features you need for a basic mosfet and the LED is quite a good addition. I use this on my LCT ASVAL, and it really was handy when I was hella exhausted after a MSW and cut the wires with the suppressor after the event. That's quite a design flaw on LCTs part to leave those wires exposed like that, if you own one you know. But the mosfet cut the current so no short circuit, saving my gun and battery. So I got a second one for my Arcturus AK12, since it is also tuned for a microswitch. Very nice product, just beware that the one on Evike comes with the mosfet only, inside an anti-static bag. The other unit I got locally and came in a nice box, with manual, spade connectors, 22awg wire, heatshrinks, etc... ie everything needed to install. And they were both the same price. So just be aware this is the case with the "OEM" model. Hence why I knocked a star off on this specific review, because there is a more complete package of the same product out there. Thankfully was able to use the leftovers from the older box for this, just barely.

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