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Matrix Full Metal M240B Airsoft AEG Squad Automatic Weapon w/ Box Magazine

ID: 50809 (AEG-MTX-M240B)
6668 / M240
Matrix8591885080956668 / M24050809
3.7 stars, based on 23 reviews
Matrix Full Metal M240B Airsoft AEG Squad Automatic Weapon w/ Box Magazine
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This item is currently Sold Out

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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  • Heavy duty metal receiver, carrying handle, and mock heat shield
  • CNC Machined aluminum outer barrel w/ Quick detach barrel system, like the real thing
  • Integrated front RIS for additional tactical attachments; 20mm Picatinny optic rail
  • Steel folding bipod with integrated locking tab
  • 4000rd automatic winding box magazine, plugs directly into the gun's battery power
  • Machined CNC aluminum hopup unit
  • Heavy-duty polymer stock with metal butt plate
  • Metal M240B style gearbox with lipo ready internals
In the late 1970's the US Army adopted a new 7.62mm medium duty machine gun into their ranks: the M240. It was first used as a coaxial machine gun in tanks but slowly made its way to other mounted uses by the late 1980's, the updated model referred to as the M240C. Due to a surplus of M240C's the Army passed some on to the USMC. When the Marines got their hands on the M240C they installed an "infantry modification kit", thus spawning the M240G, the first infantry model of the M240. Having seen the success of the M240G and its effectiveness as a ground mounted 7.62mm machine gun, the US Army decided to test and eventually adopt the M240B, the slightly updated factory production variant of the M240G, into its ranks to replace their outdated M60E4's. Throughout its years of service the M240 has proven itself, in all its variations, to be an effective, reliable medium duty combat machine gun.

The Matrix replica of the M240B does a great job at capturing the hefty, tried and true durability of the real thing. It's made from heavy-duty materials giving it a great feel, and features some really nice fit and finish. The Matrix M240B stays true to layout of the real thing with its steel folding bipod, heavy duty carrying handle, a 20mm Picatinny optics rail, and the 20mm Picatinny front end. The quick-detach outer barrel system makes it extremely easy to clean and service the inner barrel when needed, and the hopup adjustment system is very easy to use. The Matrix M240B comes supplied with a 4000rd automatic winding box magazine that plugs directly into the main power, so no need for any extra, odd-sized batteries. The battery sits inside the polymer stock, which is built like a tank and very easy to remove when a battery change is necessary. Internally the Matrix M240B features a full metal, fully reinforced lipo ready gearbox, so parts are readily available here at

In summary, this is the best M240B Airsoft replica on the market if you are shopping for one!

Manufacturer: Matrix

FPS Range: 400-450


Length: 1245mm
Weight: 8200g
Inner Barrel: ~440mm
Magazine Capacity: 4000rd box magazine
Muzzle Velocity: 400~450 FPS (Measured with 0.20g BBs)
Gearbox: M240B type full metal / lipo ready gearbox
Motor: Short Type
Fire Modes: Full-Auto, Safety
Battery: 9.6v Small Type recommended (Battery not included. Wired to the stock with a Large Tamiya connector)
Hopup: Yes, Adjustable
Package Includes: Gun, Box Magazine, Manual


About Matrix

Established in 2001 for Airsofters by Airsofters. Team Matrix thrive on the vision to better the sport of Airsoft with affordable high quality Airsoft equipment. With decades of experiences as Airsoft enthusiasts ourselves, we live, sleep, and breathe Airsoft. Matrix offers a wide selection of skirmish grade replicas from rifles to pistols, a wide variety of accessories, and tactical equipment from helmets to boots. It is the Matrix mission to prepare every Airsoft shooter the perfect experience!

23 Customer Reviews

(Write a review)

by Mitchell M. on 10/22/2022
"This heavy metal beast will 100% keep heads down on the field. Its rate of fire is really fast. The box mag has been upgraded form weak cardboard to a durable plastic shell.

My only problem with this gun is that the bipod will not mount in to the gun its always down which for me isn't a big deal.
by Steve C. on 12/09/2019
"Love this gun, very good range, accuracy, and rate of fire. Gun sounds pretty darn good. I don't know why people complains about the weight because to my believe this is lighter that my A&K M60VN. Great gun.
by Stephen M. on 04/21/2019
"I bought one of these the day they appeared in the UK. I’d always wanted a (What we call in the UK) GPMG. Yeah, I know it’s not the same, but it’s the only FN Mag on the market and the closest I’ll come to having a real Brit GPMG ever again.

I used to be our teams support gunner and have been through M60’s (I even have 2 TOP M60’s, vintage eh, plus a few of the A&K’s and some very rare ones. Also M249’s in different configs, a couple of Stoners (Do defo buy a G&G Stoner 63 if you can, PKM, MG34, MG42, CZ, and a load of other weird MMG’s, Ha, even a BAR). This without even blinking is the best EVER!.

I used it as my day gun and used it every weekend for about 4 years. I ran it on a 350 spring but that was the only upgrade/downgrade I made. On average I’d go through about 10,000 each weekend (I didn’t say I was good, just enthusiastic).

I think I cleaned the barrel every month, the gearbox just once over all that time. The only time it was out of service was when I leant it to someone I hardly knew for one game, he managed to trip over a log, smash the mag pouch into a tree and shear all the holding lugs off. EVIKE managed to send me replacement for all part! To the UK! On such a RARE gun! I was very impressed. And she was back up and running like a bream the day I got those.

This M240 or GPMG or FN MAG, whatever you want to call it is LEGENDARY to me. When I die, I want to be buried with it.

The only downsides I found are:
You have to understand support gunning, this is NOT an assault gun.
Get to the Gym, this is HEAVY
It’s also cumbersome... Not for CQB lol
Awkward and silly to the max (You could do the same thing with an MP5K, massive external battery and huge drum mag)

Good points:
Never Ever went wrong
You can load and fire at the same time.
It intimidates
You’ll get a good workout
You can stop an entire team assault, on your own, if you have the b*lls
After doing a “Predator” style “constant fire without releasing the trigger, until everything is dead” you may find your team mate who had to hit the dirt 3 mins earlier turning to you and saying “HOLY F*** THAT WAS AWESOME”. Just smile.

All in all
This is a difficult piece to use, for sure. But when it comes together, there is nothing else I would ever want to go on to the field with! Have a FANTASTIC day :)

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