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Gate MERF 3.2 Burst Advanced AEG Airsoft MOSFET Unit

[37990 / GATE-M32]
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Battery Information Video
New to airsoft? Here are some safety tips for airsoft guns that we recommend following.

The MOSFET utilizes the energy from the battery to direct power to the motor while bypassing the mechanical trigger contacts. As a result, a higher rate of fire and trigger response is achieved while protecting the trigger contacts from burning out.

Active Break
Active breaking allows for users to have a realistic function with their AEG. In Semi Mode, the brake does not allow for compressing a piston after a shot. The piston will stop in an uncompressed position which prevent stress in the system to help increase the life of the gearbox. The airsoft gun stops firing immediately after releasing the trigger. Thus, more realism is gained for your desire.

Electronic Fuse
The unit has a thermal protected construction to protect the AEG installation.

Battery Protection
You no longer have to worry about your battery becoming over-charged with the help of this model. The microprocessor monitors the battery constantly to ensure the best outcome for your battery life. The controller is able to detect critical life of the battery and will stop the battery from firing the AEG.

Debouncing (Digital Interface)
The Digital Interface provides full compatibility with the micro-switches. It is fully resistant to contact bounce. You gain a bigger ROF, a faster trigger response and your MOSFET is less likely to heat up.

3rd Generation MOSFET
Gate has done a magnificent job in creating their modern transistors and microcontroller for being the smallest and most reliable AEG controller in the market.

Rate of Fire Control
Control your rate of fire no matter what voltage LiPo battery you with to power your airsoft gun. The system ensures there is no loss in the rifles rate of fire.

Smart Trigger
Gate knows how vital the fast trigger response is during combat. This is why they have developed the Smart Trigger function. It enables you to achieve a faster trigger response. It works with the ROF Control system. During the first shot, the microprocessor sets the ROF Control to 100%. After the first shot, it switches to a previously programmed value (e.g. 50%). As a consequence, the first shot is fired at a full rate of fire, and subsequent shots at a reduced ROF. The best results can be achieved by using a battery with a higher than standard voltage. For example, if you use a 7.4V battery, you can replace it with 11.1V. In this way, you will achieve a faster trigger response with the same rate of fire as with a standard battery. The Smart Trigger is most effective when the Burst time is set at 3 rounds.

3 Round Burst
Burst mode enables you to make 3-shot series. In this way you can save ammunition and increase the realism. You can change AUTO mode to BURST mode or SEMI* mode to BURST mode. If in SAFE/SEMI/BURST mode you release the trigger earlier, you can make one or two shots. The burst time is set in the menu with accuracy to 4ms. The processor actively compensates for the change in burst time with a decrease in the rate of fire due to battery discharging. SEMI to BURST in enhanced mode only.

Configurable Fire Selector
The function gives you the option to program your fire selector. There are five modes:


Operating Modes
You can connect the system to a rifle in two ways. Depending on the selected method, you should set a proper operating mode: Plug&Play or Enhanced

Plug&Play: All you need to do is connect the system between the battery and the rifle.

Enhanced Mode: It requires modification of AEG installation. We connect trigger contacts to MERF 3.2. We can do it using the signal wire attached to the kit.

Manufacturer: Gate
Model: MERF 3.2 Burst Advanced AEG Airsoft Mosfet Unit
Maximum Continuous Current: 35A ( 50A for 3 min )
Stand-by Current: 0.15mA
Resistance: 2.4 mOhm
Package Includes: MERF 3.2, Additional kit of Deans-T Connectors, Single Signal Wire, Double Signal Wire, Programming button
Warranty Length: 1 Year
Warranty Handler: Gate (Warranty Policy)


  • The system works correctly in a wide range of voltages 3.2 - 15V
  • Compatibility with the strongest AEG replicas
  • Simple installation
  • Protections
  • Very low current consumption in stand-by (0.15mA)
  • Very low resistance ~2,4mΩ
  • Compatible with all types of GearBox
  • 4 LED Display
  • DEANS-T Connectors

Please Note:

  • Professional installation is recommended. Improper use or installation of upgrade parts are 99% of the time the cause of failures of these items.
  • Please thoroughly inspect any parts for defects before attempting installation. Due to the high possibility of damage from improper installation, we will not warranty parts after attempting installation.

Manufacturer: Gate
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