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

ID: 50809 (AEG-MTX-M240B)
3.9 stars, based on 12 reviews
A&K / Matrix Full Metal M240B Airsoft AEG Squad Automatic Weapon w/ Box Magazine
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CanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.

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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adopt the M240B, the slightly updated factory production variant of the M240G, into its ranks to replace their outdated M60E4's. Throughout its years of service the M240 has proven itself, in all its variations, to be an effective, reliable medium duty combat machine gun.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!


  • Heavy duty, full metal receiver
  • Quick detach barrel system, like the real thing!
  • CNC Machined aluminum outer barrel
  • Metal mock heat shield
  • Integrated front RIS for additional tactical attachments
  • 20mm Picatinny optic rail
  • Adjustable front and rear sights
  • Steel folding bipod with integrated locking tab
  • Built-in, heavy duty metal carrying handle
  • 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
  • Full metal M240B style gearbox with lipo ready internals
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

Manufacturer: Matrix OEM: A&K . USA Distribution: Matrix. Japan Distribution: S&T

Things you may need to get started:
    Battery and Charger – Required to power your AEG; use a high quality battery and charger for best results.

    BBs – High quality precision 6mm BBs recommended; Use 0.20g – 0.25g BBs for best results.

    Silicone Oil – Basic cleaning and lubrication maintenance help keep your Airsoft AEG in top working order.

FPS Range: 400-450

California residents click here for Proposition 65 warning

12 Customer Reviews

(Write a review)

by Emmet R. on 06/29/2018
"I love this gun, itís tough to ads if your standing but itís an MMG (medium machine gun); itís meant to work w/ a team and post up somewhere. My only complaint really is the charging handle feels really weak (quiet, wimpy).
by James W. on 05/24/2017
"I'm gonna start off by saying I'm in love with this gun. It's not for performance reasons mind you, but there is just something about it. First time I ever brought the old girl out, the jaws dropped on everyone's face, as well as always being asked if they could shoot it was priceless. The externals are great on it for the most part, however you will be hit by things like the broken bipod lug, burring on the stock attachment point and perhaps the charging handle breaking off. So far I've had this gun since June, 2015 and when it works, it shoots impeccably. This thing has been serviced six times due to the piston shredding or parts breaking. I put up with it because I'm stupid and just seem to can't sell it because I want it to work too much. I'll probably end up just HPA'ing this thing just so that way the mechanical nightmare will end. Also the gun is quite cumbersome for all but the largest of folks.This beast of BB gun will test your patience and your wallet's endurance, but I would do it all over again.
by Adam M. on 01/19/2017
"I've gotten two now from evike, both for my humvee. Both arrived wired backwards, which locked the gearbox when pulling the trigger for the first time, and one arrived with a cracked bipod leg. The box mags were also wired incorrectly, causing them to run in reverse when hooked up.

Evike should at the very least test fire guns before shipping them out. No QC whatsoever.

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