Jefftron MOSFET V3 With Wiring

Jefftron MOSFET V3 With Wiring





This is a professionally made mosfet designed for airsoft electric guns (AEG) by Jefftron. This device increases the rate of fire in your airsoft weapon, and at the same time makes the battery last longer, than with basic wiring.

This device is fully integrated inside your V3 gearbox, instead of the original trigger contacts, and is compatible with Tokyo Marui standard V3 gearboxes.

  • Easy installation inside your V3 gearbox
  • Presoldered wires allow faster and easier installation into the gun, and the wire is long enough for all kind of weapons
  • Simply cut wires to the required length and attach connectors (included in the package)
  • On the devices are soldered high quality 2 black wires 1,5 qmm (AWG16) with silicone insulation, length 400 mm to the motor and 600 mm to the battery.
  • The blue wire 0.25 qmm (AWG24) with a length 1000 mm is used for connection anywhere on the red cable
  • In the package is included 1000 mm red wire 1,5qmm (AWG16) with silicone insulation
  • Board with electronics is coated with lacquer, which protects the device against water
  • If you want to use your own wires, choose device without wiring
  • Devices without wires, you can use max. 1,5qmm (AWG16) power wires and 0,5qmm (AWG20) signal wires
  • Designed for spring strength up to M160 (equivalent for current 75A single shot fire or 25A burst fire for max. 30s). For higher load please use Mosfet II (it is outside gearbox)
  • Specified for common batteries up to 17V (Ni-xx 8.4 - 12V, lipo 7.4 - 14.8V)
  • No current consumption in the idle mode
  • No sparking on switch contacts
  • For this device to function properly it is necessary to have a functional gearbox cut off lever, selector plate, reverse latch, trigger and trigger block, as is found in a standard gearbox


  • Mosfet on trigger contacts
  • Trigger switch
  • DeanT connector male
  • 30A mini fuse
  • 4x faston female 2,8mm
  • 6x black heat shrink tube 3,2mm - length 20mm
  • 3x black heat shrink tube 4,8mm - length 20mm
  • Installation manual in English

WARNING: Installation of this device should be left to an expert, who could solder and disassemble your airsoft gun confidently. We do not recommend you attempt this fitting yourself due to dangerous operations such as using a soldering iron.

Remember - if you don't feel comfortable carrying out your own gun servicing, repairs or upgrades, we have experienced airsoft technicians in-store and can do the work for you. You can even book a service with us online by clicking the link below!

Book a Gun Service.


To buy an airsoft weapon in the UK you must have a valid airsoft defence.

This is not a licence, it is basically just proof that you intend to buy an airsoft weapon for use in airsoft.

An airsoft defence could be a UKARA or membership with the British Airsoft Club, and various other forms of defence.

You can only obtain an airsoft defence once you are over the age of 18.

To get an airsoft defence the law is that you should play at least 3 games of airsoft, and that you must have been playing for at least two months.
You can still buy an airsoft gun without a defence, provided you are 18 or older. If you choose to do this we would, by law, two tone (paint in a bright colour) parts of your chosen weapon. This is because an airsoft gun is considered a RIF aka Realistic Imitation Firearm, because they are so close to the real steel, whereas when you paint parts of it in a bright colour it becomes an IF aka Imitation Firearm. The reason being that the bright colours make it look less realistic to the public, and therefor less likely to be mistaken as real, were it to be used for any other purpose than airsoft.

When you order a gun from us you will need to add your defence details in the comments section of the cart. If you do not have a defence you will need to write the colour that you wish to be used for two toning your airsoft weapon.

Here is what's stated in the VCRA (Violent Crime Reduction) Act:

For airsoft skirmishing, the Association of British Airsoft is putting in place arrangements to allow retailers to check that individual purchasers are members of a genuine skirmishing club or site. The key elements of these arrangements are:
1. new players must play at least 3 (three) times in a period of not less than two months before being offered membership
2. membership cards with a photograph and recognised format will be issued for production to retailers
3. A central database will be set up for retailers to cross-check a purchaser’s details
4. member’s entry on the database will be deleted if unused for 12 months.
The defence for airsoft skirmishing can apply to individual players because their purchase of realistic imitation firearms for this purpose is considered part of the “holding” of a skirmishing event.
Size Chart