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SIG SAUER ProForce MCX VIRTUS AEG (Model: 11.5" Barrel PDW)

SIG SAUER798681608270AIR-PF-MCXAEG93839
3.8 stars, based on 4 reviews
SIG SAUER ProForce MCX VIRTUS AEG (Model: 11.5 Barrel PDW)
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Optics, suppressor, Lantac magazine, and vertical grip shown in images not included
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Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
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Model Options:


  • Precision CNC machined all metal receiver w/ M-LOK handguard; fully licensed with deep engraved roll marks
  • Accurate weight and feel to the real thing
  • Barrel and handguard comes apart just like the real thing (allows easy access to battery compartment)
  • Ambidextrous charging handle w/ realistic dual return springs; mock bolt locks back for easy access to hopup adjustment (functional bolt stop)
  • Ambidextrous controls (selector, mag release)
  • 3 position telescoping PDW style stock
  • VFC Avalon Gearbox featuring improved bearings, quick change spring system, built in MOSFET, and powered by high torque neodymium magnet motors; Rifle comes with m120 spring pre-installed for outdoor use, m110 spring included to meet indoor field FPS limits
  • QD sling mounts on handguard, lower receiver, and stock
Since the early mid 1800s SIG Sauer has been widely regarded as a purveyor of some of the best small arms on the planet. Known for their fine combat, competition and personal defense pistols and rifles, SIG Sauer holds law enforcement and military contracts the world over and is the personal choice of thousands of firearm owners. People who trust their lives to a firearm put their trust in SIG Sauer.

SIG Sauer, a long time maker of real firearms and airguns has now taken their first step into Airsoft training weapons with their own in-house developed MCX VIRTUS AEG. Designed and engineered for professionals and discerning recreational shooters, the MCX is the latest offering from the rapidly growing SIG AIR division of SIG SAUER. The MCX VIRTUS does a wonderful job of replicating the look and feel of its real-life counterpart. One of its main features is the amount of modularity the rifle has to be easily configured for just about any kind of loadout to fulfill a multitude of roles.

The SIG AIR ProForce MCX Virtus is a very effective, safe training tool for professionals and avid target shooters that replicates the look and feel of its firearm counterpart, making it an ideal option for training in a myriad of environments where live fire is not possible, said Matt Handy, Director, SIG AIR. This is an exciting product for SIG AIR because, like the MCX, its completely modular and can be easily configured for multiple variations or loadouts based on purpose.

The SIG AIR ProForce MCX Virtus airsoft rifle is a battery-powered, automatic electric gun (AEG) that runs on a rechargeable battery. The airsoft rifle features an adjustable hop-up creating spin on the BBs for additional stabilization in flight, resulting in increased distance and accuracy. Equipped with interchangeable springs for velocity enhancement, the SIG AIR ProForce MCX Virtus has three fire control modes (safe, semi-automatic, and automatic). The included magazine holds 120 rounds of 6mm polymer or biodegradable BBs, with a velocity up to 400 fps and muzzle energy of 1 joule (using a .20-gram polymer BB.)

The VFC Avalon gearbox is an improved Tokyo Marui Spec Ver2 with low friction high quality steel bearings, built-in MOSFET, and quick change spring system; driving the gearbox is a high torque neodymium magnet motor.

Manufacturer: SIG SAUER (UPC: 798681608270)

FPS Range: 390-420

Color: Black


Length (Overall): 737mm (29")
Inner Barrel: 295mm
Weight: 3kg (7lbs)
Magazine Capacity: ~120rd
Thread Direction: 14mm Negative
Gearbox: VFC Avalon V2 Gearbox with ECS
Motor: Long Type
Fire Modes: Semi/Full-Auto, Safety
Battery: 11.1v LiPo Butterfly Type Recommended (Wired to handguard w/ small Tamiya)
Hopup: Yes, Adjustable (Rotary Style)
Package Includes: Gun, Magazine, Manual, m120 & m110 Springs


SIG SAUER, Inc. is a leading provider and manufacturer of firearms, electro-optics, ammunition, airguns, suppressors, and training. For over 150 years SIG SAUER, Inc. has evolved, and thrived, by blending American ingenuity, German engineering, and Swiss precision. Today, SIG SAUER is synonymous with industry-leading quality and innovation which has made it the brand of choice amongst the U.S. Military, the global defense community, law enforcement, competitive shooters, hunters, and responsible citizens. Additionally, SIG SAUER is the premier provider of elite firearms instruction and tactical training at the SIG SAUER Academy. Headquartered in Newington, New Hampshire, SIG SAUER has almost 2,000 employees across eight locations in the U.S. and around the world.


SIG SAUER air pistols, air rifles and accessories are engineered to elevate airguns to a new standard of performance. Perfected for practice with every advantage built in, these airguns are the economic, authentic answer to training more often, more effectively.

About ProForce

The SIG AIR ProForce line of airsoft guns is designed for professionals who train frequently and want the option of training safely in realistic force-on-force scenarios. SIG SAUER is a huge proponent of training, and we will continue to offer our customers numerous new product options to facilitate the safe practice of gun handling and target shooting in various environments.

4 Customer Reviews

(Write a review)

by Matt R. on 01/05/2020
"So I just received this rifle a couple of days ago and have been able to field it for a whole day. I can officially say this is one of my favorite airsoft guns and you should absolutely buy it if you want something different than an M4.

Build Quality: Sig really went all out on the design of this rifle. It looks and feels just like a real MCX. The trades are all there, the metal and plastic parts are all durable and won't bend or break, and its just a very well put together rifle. The only thing that sucks about the design is where they decided to put the battery, which is this tiny space up in the handguard. The only battery that would fit for me was a triple cell nunchuck 11.1v

Shooting: This is the best out-of-the-box rifle I've ever seen. I could hit consistent targets at up to 200 ft with .28g bbs. The trigger is solid and the full auto with an 11.1v battery is stupid fast.

Ergonomics/feel of the rifle: This is a really important category for me when I decided on a rifle to buy, and this one is perfect for most situations. The three position stock is handy for CQB, and I usually keep it all the way folded in to keep it as compact as possible. The front handguard needs a grip or a handstop like I have on mine, and you will absolutely need m-lok covers, as the hand guard was CNC milled, so it is quite sharp. You have plenty of rail space on the top for whatever optics you like, and the rear grip is very comfortable.

Cons: one absolutely massive con on this rifle is the orange tip this gun comes with. Omfg it is a NIGHTMARE to get off. I had to take a diamond dremel blade and cut it off. Hopefully no one else has this problem, but this is just a PSA to anyone who gets this gun. Aside from that, the only other con I have is the battery placement, but with the correct battery you can stuff it up above the barrel and into the upper receiver to get it out of the way.

Overall, this gun is great for all situations, CQB or milsim. The build quality is second to none and the range and accuracy out of the box is top notch. As I said to my friend, it's the Bugatti of AR-platform rifles.
by Roy J. on 01/04/2020
"Pretty good so far. Basically a VFC Avalon with a different body.
by Thompson R. on 01/08/2020
"I received my rifle a few days ago and I have a few things to say about it. To start at the tip, you get a nice metal flash hider, but its painted in the brightest orange possible and is torqued on so tight i'm scared that i'm going to bend the barrel trying to get it off. moving back, the hand guard is awesome, its solid and feels great. The battery is stored in the hand guard and it is tight to say the least, I was able to fit a 9.6v 1600mah nun chuck battery in there but it was tight. A more reasonable battery I tried use was a 1000mah 7.4 nun chuck. Moving farther back to the receiver, my mag well was a bit wonky, it is decently picky on what mags like to work in it. I tried VFC metal mags, Dytac HEXMAGS, PTS EPM's, and 6mm proshop mags. What I found was that not all these mags fit 100% besides the VFC mags. It seems that the mag well is a bit wider than most others because I was having issues with mags not locking in properly, and easy fix to this issue was to shim the magazines by wrapping a single strip of electrical tape around all the mags. This fixed all fitment issues. Now to the grip and fire selector. The grip is nice, but the angle of it is a bit to much for my taste. The fire selector on my gun was loose when I got it, I tried tightening the retaining screw on each side but had the same issue of there being a lot of play in the selections. The stock is great with no wobble and is super solid, no complaints here. The rear QD sling point on the gun does not fit standard QD sling swivels oddly, but the one on the hand guard had no issues fitting one. The gun does feature a well made bold hold open for adjusting the hop up. The charging handle works and feels good as well. Moving to the internals. The inner barrel is 295mm long with what I can tell is a standard VFC 6.03 Tight bore barrel, with .20g bb's the gun was shooting around 415fps and below 350fps with the included m110 spring. The hop up in the gun is a standard VFC Avalon rotary style hop up, it is effective and is stiff to adjust. Now to the biggest problem with the gun... the gearbox. I believe I received a lemon considering this is the first batch of MCX's, and the fact I have not had this issue with any of my other Avalons. When I first test shot the gun in semi auto, it shot full auto for whatever reason, I then switched to full auto and it worked fine, but when I switched back to semi and shot 4 rounds before the gun locked up completely. Note I was using a freshly charged 7.4v. After I got the gun unlocked I tried semi again but had the same issue of it randomly shooting full auto then locking up, I had the same result with an 11.1v and a 9.6v battery so i'm confident it was no the batteries I was using. Interestingly on the second try on semi auto the trigger locked up like it was on safe. This was honestly a shame as I expected a lot from this gun considering it is an Avalon. To conclude this gun externally is fantastic and sig did a very nice job making it. Internally, my gun is not very sound, I believe it is the mosfet causing the issues i'm having but I am not 100% sure. The rest of the components, Gears, motor, Hop, etc are solid as usual from VFC.

Solid build construction
Great internals, minus the mosfet
MLOK compatible
Great weight (around 8lbs loaded)
Well balanced

The orange muzzle device is obnoxious
Battery storage
Mag well fitment issues
Fire selector lose/play
Bad internal mosfet

This gun is great if you can overlook its shortcomings, it can be a potential dream for someone wanting to upgrade a gun due to its excellent externals. I'm sure I received a lemon, but it still sucks buying a $400 gun for it to not work properly...

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