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VFC SOPMOD M4 | Fox Airsoft

Posted by Tang on 25th Jan 2021

VFC SOPMOD M4 | Fox Airsoft

VFC is one of my favorite brands for top tier AEGs, particularly the M4. The reason I like them is because the performance out of the box is always efficient and smooth. The gun inside and out has very good tolerances so it feels like it is put together well no matter what part. The gun uses almost all common parts available so if you need to upgrade or repair anything, everything should fit easily. When looking at a high end AEG, you could stack this up easily against an ICS or Krytac. Each proline AEG will have their quicks but all in all, performance among the best of each brand will be very similar so you should make your choice based on the features you like and what you intend to do with it. VFC stands for Vega Force Company and they are brought to us in the US by Umarex/Elite Force.


The VFC we are looking at today is the newest version of the Block 2 SOPMOD. This particular look is not new by any means so I will go over the new stuff first which lies inside: VFC’s internals have undergone numerous evolutions and this is noted by the code name Avalon. The Avalon gearboxes feature tight tolerances, excellent compression, and really good rate of fire and trigger response out of the box. Avalon gearboxes are among the first from VFC to feature a built-in MOSFET. MOSFETs are electronic chips that improve trigger response and extend the life of the trigger contacts which is a wear item inside the gearbox. MOSFETs do this by supplying power directly through the motor and relying on the switch assembly to only function as a signal to turn that motor. On a conventional switch, the switch assembly will flow electricity from the battery to the motor when the trigger is pulled. This works fine when it comes down to it, but it is not efficient and it can cause the trigger contacts to eventually burn out.

VFC Avalon Mk18 Mod 1

Lots of high voltage battery usage and semi auto burns these out sooner and require a full teardown of the gun to replace. The gearbox features a quick-change spring guide, allowing you to change your spring rates after some disassembly. It is not the easiest by any means, but many quick-change spring systems are exactly the same in terms of difficulty. The barrel is 6.03mm tight bore so you are already going to be quite accurate out of the box. These are high quality barrels so unless you have a particular other brand you have a preference for, I’d say this one is good to go out of the box.

Now coming back to the outside, this rifle is modelled after the Block 2 revision of the M4 carbine carried by special operations in the United States military. As far as the rifle goes, this would entail a base M4 using a Daniel Defense M4A1 RIS. Great attention was paid to the anodizing and the little details that make the DD rail system so popular. Older aftermarket rail systems didn’t always get the color right but compared to this real one, this is pretty much identical. The rail system might weigh a bit more than a lot of cool guy high speed M4s, but the military chose this because of how rigid it is which is important to mounting accessories such as lasers.

VFC Avalon Block 2

The fit and finish on the body is superb and the tolerances are always precise. In face I could slap on my older VFC upper on here no problems. Sometimes the lower tier brands that make metal guns at a lower quality will be all over the place on tolerances and fitment, and you would often think the guns were made from two different factories. Not the case here.

The gun shoots nice and crisp at the upper limits for outdoor use. I want to stress that this gun operates smoothly and efficiently. Everything feels like a well-tuned machine. Rate of fire is an effortless mid 20 rounds per second. I would recommend at minimum using .25’s but .28’s would do better in this rifle.

This AEG is best suited for the milsim type player looking to build a particular loadout around the gun. This comes with its best version of its gearbox ever and should provide you with everything you need in the performance category. For people who want something that works really well out of the box and don’t want to have to mess with anything, I think it is a solid buy. If you are wanting to change out some random things for personal preference, you could also certainly do that here which is the appeal of the VFCs since they make all their parts fit normal specs. VFCs to me are great and a dependable choice because rather than reinvent the wheel, they refine what they are doing with each new model.

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