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ASCU Gen 4

  • ASCU Gen 4




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$9.99 for orders under $125


Fox Airsoft offers a 30 day warranty and return policy.

Out of Stock

About the ASCU Gen 4

The Airsoft Systems ASCU Gen 4 is an electronic fire control unit designed to decrease the strain on your gearbox and improve the electrical performance of your Version 2 AEG. A traditional AEG switch uses a series of contacts which are closed until the trigger is pulled. When the trigger is pulled, the circuit is open and electricity flows through the contacts. These contacts can get dirty over time from the electrical arcing that will occur and eventually burn out, causing your motor to not get any electricity. With even the most basic of MOSFETs, you get protection from arcing and a more efficient electrical system overall. The motor gets fed the power directly and the switch now acts as the on/off switch, rather than being the conduit where power flows through the switch and then into the motor. 

Beyond the standard features of a basic MOSFET, the ASCU offers a ton of options to the advance user. Starting with the actual switch itself, the whole unit becomes microswitch activated. No more long, heavy trigger pull that is found in a stock AEG. You can run adjustable aftermarkets such as speed triggers to further reduce the travel. Another great feature is the short circuit protection. This protects the MOSFET from any spikes in voltage that would normally damage the unit. The best thing about the unit is that installation work requires no soldering. Everything is wired up and ready to go, you just need to make sure it fits the gearbox shell you are using.

If you need help or consultation on repairs you could give us a ring at (888)316-7816 or shoot us an e-mail at . Although we only offer tech work to our local walk-in customers, we would still be happy to point you in the right direction. The senior staff and owners of the company have been playing for well over 15 years and certified and authorized by several major manufacturers to do OEM quality repair and warranty work.

Note: Fox does not warranty or accept returns for parts that have been installed/attempted to be installed.

Note: Due to varying manufacturer tolerances for gearbox internals, parts compatibility no matter what version might NOT fit even if it is supposedly correct and fitment is NOT guaranteed. The reality is that some parts may need fitting and some parts might look the same but the dimensions are slightly different enough to not work. This will require technical experience to identify to overcome.

What's Included In The Box: 

  • 1 x ASCU Gen 4
  • 1 x Selector Plate
  • 1 x Cutoff Lever

Quick Overview:

  • Increased Trigger Response due to lower resistance
  • Active braking
  • Optional Simulated Bolt Lock-back
  • Simple Drop-In Installation
  • No soldering required
  • Increases Gearbox Reliability
  • Fits all standard and reinforced Version 2 gearboxes
  • Easy programming
  • Improved short-circuit protection
  • Compatible with Lipo, NiMH, NiCd, LiFE batteries ranging from 7.2v to 12v

Technical Specifications:

  • Model Number: 18234
  • Compatibility: Version 2 AEG

Weight & Dimensions:

  • Weight is: 
  • Entire package weight: 
  • Length: 

Replacement Parts



Alternate Lookup: 18234

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