Product code:
  • Full Auto Only
  • Support Weapon
  • 2400rnd Box Mag

Realistically constructed from both alloy and polymer, this 6mm BB Airsoft electric gun is an excellent replica of FN’s successful M249 Squad Automatic Weapon, this particular MK46 variant being modernised and featuring an ergonomic and retractable M4-style stock. 

Full description


Thanks to its realistic material construction, this Airsoft replica MK46 feels and handles similarly to the real thing, having a satisfying bulk and weight to it. The weapon is almost entirely constructed from alloy, with only the handguard, pistol grip and AR / M4 style stock being constructed from polymer.

Just like the real thing, this Airsoft replica possesses a folding bipod, built into the front handguard and heatshield. The bipod is easy to deploy, allowing you to get set up and fire from a fixed position quickly, ensuring that you can unleash a hail of suppressive fire in mere seconds. Each bipod leg can be independently adjusted for height, allowing you to set up a stable position on a wide range of terrain types.

This variant of the M249 has been modernised, with the addition of a new handguard / heatshield stock, designed to enhance the practicality and ergonomics of the weapon. The traditional M249 stock has been replaced by an ergonomic AR / M4 style retractable stock, which can be adjusted through a variety of positions for user comfort.

The handguard / heatshield has been comprehensively redesigned and now features a grand total of six, full-length 20mm RIS rails, allowing the attachment of a wide variety of weapon accessories. Lasers, flashlights, QD sling mounts, grips, even Airsoft grenade launchers – you can customise your MK46 to your heart’s content. The MK46’s top cover also features a 20mm RIS rail for the installation of optics and scopes, in addition to the weapon’s original fully adjustable ironsights.

As you would expect of a support weapon, the MK46 Retractable Stock is supplied with an electronic box magazine with a staggering 2400 BB round capacity. If you (somehow) manage to burn through all that ammunition in a game, this Airsoft replica can be fed from Airsoft STANAG M4 AEG magazines, similarly to the real M249 design. Rather than having to return to the safe zone to reload your box magazine, you can just borrow your mates’ magazines!

Realistic construction, practical and ergonomic design features, and the ability to make it rain BBs over the skirmish field – what’s not to like? If you’re looking for a modern, tactical and ergonomic Airsoft support weapon, then the MK46 Retractable Stock is an excellent choice.


  • 1:1 Scale
  • AR / M4 style sliding stock
  • Folding shoulder support brace on stock
  • 6x Handguard / heatshield 20mm RIS rails 
  • Upper 20mm RIS optic / sight rails
  • Ironsights with full windage and elevation adjustment
  • Mock Carry Handle
  • Lightweight polymer handguard
  • Front / rear sling loops
  • 51cm Inner Barrel
  • Accepts box magazines or STANAG magazines
  • Removable flash hider
  • Quick change spring system
  • Full metal gearbox
  • Integrated bipod with height adjustable legs

Package Includes:

  • A&K MK46 - Retractable Stock
  • Magazine
  • Manual



Weapon Construction External
Weapon Type
Support Weapon
Over 18 Only Icon
Over 18
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 350fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Included Items
  • Magazine
  • Instruction Manual
Skill Level Icon
User Skill Level
Regular Player

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 5.4kg
Weapon Length Extended
Length (Extended)


Colour Wheel Greyscale
Primary Colour
Black, Tan ,
Two Tone Icon
Pre Two-Toned
Construction Icon
Full Alloy with Polymer handguard & pistol grip
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Weapon Platform
Magazine Style Icon
Magazine Style
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Weapon Scale Icon
Weapon Scale
Suggested BB Weight


Hop-Up Unit Icon
Hop-Up Unit
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Hop-Up Unit Location Icon
Hop-Up Location
Remove barrel assembly to access


Weapon Furniture Icon
  • Railed Handguard
  • Bipod
  • Railed Receiver
  • Sliding Stock
Rail System Icon
Rail System
20mm RIS / RAS
Icon Stock Positions
Stock Setting
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
Iron Sights

Magazine Specific

Magazine Type
High Capacity, Box Magazine, AEG,
Magazine BB Capacity
Approx. 2400 Rounds
Magazine BB Fill Method
Fill Window

Electric Gun Specific Information

Battery Specific
Battery Connector
Patrol Base | Icon | Mini Tamiya
Mini Tamiya

Product Testing Data

Notepad Icon
Test Description
Notepad Icon
Tested Using
ASG Blaster 0.20g BBs

Delivery & returns

Postage Estimates

Below are some rough postage prices for orders. Please note these are subject to change, and are only a rough guide. For more accurate postage estimate please use the Postage Calculator at the basket.

UK Standard



UK Next Day



Highlands / Islands






* Please note that Scottish Highlands, Islands and EU post prices can vary wildly. Prices range from £8.99, up to £29.99, so please ensure you refer to the Postage Calculator at the basket for the lowest possible price.


For more detailed information please see our Delivery Information.

We are proud of our rapid delivery which, comprises of Royal Mail 1nd class recorded and courrier next working day to mainland UK. We also ship to EU countries; Scottish Highlands and Islands which are a minimum of a two day service and are shipped by land / sea. Our deliveries are made by DPD and Royal Mail recorded 1st or 2nd class signed for, and Royal Mail Standard.

We deliver from Monday to Friday, and Saturday with a special service. If more than 7 days have passed since we confirmed dispatch and your order has not arrived, then please call our Customer Care team on 01484 644709. If we don’t have stock of an item then we will call and email you letting you know that it is out of stock, and we will send it to you as soon as stock becomes available. If you want to cancel any item/s that are out of stock once order you can. For most UK deliveries postage & packing is based upon the value, size and weight of your order.

We always look to fulfil every order in full on time, but on the odd occasion an  item is missing we will attempt to contact you prior to shipping. If your order is a Next Day service, and we cannot contact you, we will refund the missing item(s), and ship the rest of the order immediately.

Upon signing for the delivery you are accepting the correct delivery for your items, however, we do understand that you might not be able to open your package straight away so you have up to 48 Hours to advise us of missing / incorrect items.

Please note we do not compensate in any way for time spent waiting in for deliveries that do not arrive, we do however accept that in life, mistakes and circumstances happen that can unfortunately mean that your item may not be delivered next day as requested e.g. bad weather, computer error etc. If such mistakes do occur we will refund your postage charge in full and by agreeing to the previous sentence and proceeding with the order you accept that we have done everything we can to help you obtain the package.

For orders outside of the UK Mainland please specify your location when calculating postage. 

For all international orders there may be an additional postage charge on top of that quoted. You will be contacted if this applies for your order. If the postage costs are too high, you may cancel your order at any time prior to dispatch.


For more detailed information please see our Returns Policy Page.

You can cancel any order that has not been dispatched. Please call our Customer Care team on 01484 644709 between 9:30am and 5:00pm or log onto the website and check the status of your order in your account.

If you do want to arrange the return of an item, simply call our friendly Customer Care team on 01484 644709 from 9:30am to 5:00pm and they will explain how to return the items.

Alternatively you can get in touch with us via our Contact Us Page.

If you are returning a product because it is faulty or something is wrong then we will pay for it to be returned to us. The Customer Care Team will arrange for cost you incur to be refunded.

You can return any item for any reason whatsoever, even if you have just changed your mind, within 14 days of receipt of the order. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.

We want you to be absolutely happy with our products and services, so we provide the simple Patrol Base guarantee:  if on receiving your item you are unhappy with your item for any reason then simply send it back to us. We will replace or refund the item.

This guarantee ensures that if you are unsure about what you are purchasing you have the peace of mind of knowing that we are here to help. In addition, if you decide that you made a mistake or you change your mind then please send the goods back within 14 days of receipt. Sadly, this can only apply to standard range products; we cannot accept back any item that has been made to order i.e. Two Tone Airsoft equipment.

Upon signing for the delivery you are accepting the correct delivery for your items, however, we do understand that you might not be able to open your package straight away so you have up to 48 Hours to advise us of missing / incorrect items.
If you do decide to return anything for whatever reason then please get in touch with us via our Contact Us Page for a copy of our returns form.

If you do send goods back for any reason other than a fault you will normally be asked to pay the carriage charges, we would just have to recover the costs in our prices. We would rather be completely straight with you, keep our prices as low as possible, and just ask you to pay if you choose to return anything.

Any none faulty return must be shipped back in full re-saleable order with original undamaged packaging.

Finance options

Looking to buy an Airsoft replica, but don't want to drop all your money at once? Perhaps you want to spread your payments over time to keep a backup of money, or perhaps you simply can't afford the hit right now and want to spread it over time? In any case you can spread your payments to take away the pain of the initial hit of the purchase of a replica, or give yourself the ability to spend that little bit more and get that rifle you've always wanted!

Want to know more about Airsoft Interest Free Finance?
You can check out our Airsoft Finance Info Page for more details >

Here at Patrol Base we have partnered with Omni Capital Retail Finance, allowing you to buy now pay later with ease.

You can select finance during the payment process which will take you to the Omnicapital portal and allow you to complete a credit check at your leisure. Once your finance is accepted you will be able to complete your order and wait for the goods to arrive!

Wondering how much it's going to cost?
Check out the examples below.

Looking to make the jump from BB guns to Airsoft, but don't want to save up to buy your entire loadout? Your time has come!

Airsoft replicas are leaps and bounds ahead of BB guns, but can sometimes carry a heavy price tag. You can spread the cost with us to save the strain on your wallet to allow you to buy your entire loadout at once, rather than piece by piece. Play now, pay later.

Want to know exactly why Airsoft Replica are so much better than BB Guns? Check out our BB Guns Page.

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