Airsoft System Smart Control Unit (ASCU)
The Airsoft Systems Airsoft Smart Control Unit (ASCU) is by far one of the most innovative MOSFETs on the market. Like a typical MOSFETs it will route the high current flow from the battery, directly to your motor, bypassing the trigger contacts. The trigger contacts only draw a small current to activate the MOSFET switch, which for all intensive purposes, puts no wear or stress on them but that’s as typical as this unit gets! Airsoft Systems considered some of the drawbacks of the version 2 gearbox and came up with an innovative yet simple to install unit that consists of two primary components, the sensor unit that goes in the gearbox and replaces the mechanical trigger switch and the control unit that contains the actual brains of the unit.
The sensor unit is a piece of art. It melds a micro trigger switch
with a sensor that is enabled by the cut off lever. This sensor unit
does two things; removes the mechanical trigger switch, in my opinion
one of the weaker points of modern airsoft design, and replaces it
with a short stroke micro switch and it also ensures that the gun
always does a full cycle with each trigger pull by tracking the
movement of the gears by way of the cut off lever. This also helps to
protect your spring as the piston always returns to the full-forward
I was pleased to find that this truly was an easy, drop-in unit other
than a small modification to the selector plate. I took special care
to make certain that the delicate data wire from the sensor unit was
not rubbing against rough edges or at risk from getting ground to
shreds by the pinion gear and in short order got my custom M4
reassembled with the ASCU in place. For starters, I plugged a 7.4V
1000mah lipo battery into my newly enhanced rifle and immediately
heard a beep telling me that the ASCU was active and I was ready to
rock and roll.
First impression was a good one. I put the gun in semi and fired a
few rounds off and all I heard was a consistent gear box telling me
that the ASCU was doing what it was supposed to do. The trigger feel
was crisp with a very short trigger travel and the response was
immediate. Next up…full auto. Tapping the trigged enables a 3-round
burst. Holding it longer causes a shower of BBs to rain from the M4
without any special programming or other transition from 3-round burst to full-auto.
To put this all into perspective, I can do nothing but to conclude
that this product is a good one and with built in features like active
breaking, battery drain protection, three-round burst and full-cycle
gear rotation it’s a must have for those looking to take their AEGs to
the next level. Some things that you may want to consider is that like
many of the other MOSFET offerings out there, your buffer tube will be
taken up by the control unit so make sure you have stock available in
your stock for the battery.
Check out the Airsoft Systems ASCU at www.airsoftsystems.com. You
won't be sorry.
Written By Bert Goo
Advanced Wargame Systems Stealth V2TC-X100 MOSFET Controller
Every once in a while a product comes along that is so innovative yet practical that it’s obvious it will be a hit from the get go. This time Advanced Wargame Systems (www.awsairsoft.com) has done it with their Stealth V2TC-X100 MOSFET Controller. Anyone that has cracked a gearbox open knows that the trigger switch can be the cause of so much pain in our lives due to damage from arcing or just a finicky trigger. AWS has solved those issues with the easiest of drop-in solutions and for all intensive purposes this has to be one of the quickest modifications I’ve done with one of the best results.
There are admittedly a lot of MOSFETs for airsoft out there and they come in a variety of formats. Some are a single unit that sits outside of the gearbox, utilize the stock trigger set-up but require more space, limiting the use of LiPo batteries in the buffer tubes of the typical M4. Others are two-piece designs that replace the mechanical trigger with a sensor but still require a control unit outside the gearbox. The Stealth system is unique in that it is totally housed within the gearbox, replacing the mechanical trigger mechanism and requiring absolutely no modifications. It doesn’t get much simpler.
The Stealth MOSFET has two switches on it. The first actuated by pulling the trigger, the second by the cut-off lever. This design reduces the number of moving parts in the trigger assembly, especially those that take the heavy wear and tear of semi-auto shooting. All the necessary wires are soldered in place and for most applications you’ll be able to plug your battery into it and start firing once you put the screws back in the gearbox.
For testing purposes we took a KWA M4 that was wired to the rear and brought the tools out for what turned out to be a quick 15 minute upgrade. Getting the gearbox out probably took more time than anything else. I took out the KWA trigger switch assembly and put the Stealth MOSFET in using the screw from original switch. The AWS unit fit perfectly and in no time the gearbox was closed and we were able to test fire the unit before installing it into the M4 body. The feel of the trigger was fantastic and we could tell immediately that we were getting an extremely quick response with each pull. One issue we had with the trigger before the upgrade is that the pull would get stiffer as the mechanical switch heated up with the high voltage running through it. Not the case any longer! Semi-fire was right on target as the gears would make a complete revolution as tracked by the cut-off lever hitting the Stealth’s internal switch. Full auto sounded slightly quicker. More on this in our next review when we run it through its paces and measure the rounds per second on our chronograph.
The one caveat I have to our earlier comment about a no-modification install was that I did have to extend the wires to the battery as the deans connectors were too close to the gear box and stopped us from getting the buffer tube back on.
For more information or to purchase this unit visit Advanced Wargame Systems at www.awsairsoft.com.
Written By Bert Goo