SigAir MPX Submachine Gun AEG

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£469.99
Was £569.99
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  • Full metal construction 
  • Quick change spring system
  • The latest and greatest SMG design!

If you are looking for something modern, compact and unique with which to turn and burn in CQB the SigAir MPX AEG would be a superb choice. This mould-breaking new SMG is a near-perfect replica of the real Sig MPX, the 9mm SMG offspring of the legendary MCX carbine. 

The SigAir MPX is built like a tank, sporting full metal construction and precision CNC machining across its externals and flawlessly realistic SIG trademarks, and is pre-wired with a basic MOSFET to keep its trigger contacts protected as you lay down rapid semi-auto shots in CQB, in the MPX’s natural habitat.

Full description

Description

Bored of SMG-5s and UMPs but want to try a new Airsoft SMG? SigAir have you covered with the awesome new MCX AEG, a modern SMG design derived from the exceptional Sig MCX. The real MPX is well known for being a superb SMG with great handling thanks to its ambidextrous M4/AR15 based controls and also makes use of the ultra slick “new” 1913 rail /20mm Picatinny rail stock attachment system, allowing you to change stocks depending on your role and operating environment. 

The Airsoft version boasts the same slick handling and cutting-edge stock attachment system with a well equipped VFC Avalon gearbox, complete with an active breaking MOSFET to keep the gearbox well timed and preserve the trigger contacts. An impressive tool with some superb CQB potential, let's take a closer look around the MPX and see what's what with this 21st-century SMG.

Starting at the tip of the 8-inch outer barrel we can find a birdcage flash hider attached to 14mm CCW male threading. The flash hider is constructed from alloy with a subtle gun metal grey finish and can be switched out for any 14mm CCW compatible muzzle device, including tracer units, suppressors and alternative flash hiders. 

The handguard of the MPX is constructed from aluminium and is finished with CNC machining, giving it a flawless form with all the details of the original firearm. M-LOK attachment slots can be found at the 3, 6, and 9 o’clock positions, providing plenty of options when it comes to accessorising the MPX without making the handguard uncomfortable to hold when kept simple. Punctuating the M-LOK slots we can see weight-reducing ports which keep the front end of the MPX lightweight and agile, ensuring you can point it quickly and react to sudden threats in a CQB environment. 

At the 12 o’clock position we have a 20mm Picatinny rail which is ready to accept any 20mm Picatinny accessories, including red dot sights and magnifiers. Despite its small size, there is plenty of room up top, and the monolithic top rail allows for a PEQ15, red dot sight and magnifier to be mounted a the same time if you are the type to deck your primary weapon out to the fullest extent. 

The battery compartment of the MPX is located inside the handguard, and can be inserted through the front where you will find a mini-Tamiya battery connector. We found that the MPX can fit a 7.4V 1300mAh LiPo stick battery inside, but will also take a nun-chuck style battery if its cells are nice and flat. Being front wired opens up the possibility of using the MPX with an external PEQ battery box and running a larger battery for those who like to spam the trigger all day without changing batteries. 

The MPX’s receiver is derived from the M4/AR15 configuration and comprises an upper receiver and a lower receiver, just like the AR. The upper is a monolithic design for optimal strength, like the MCX and SCAR, and the lower is patterned after the M4/AR15 but with ambidextrous functionality. 

The fire selector is right where you would expect it; above the pistol grip, sitting right beneath the shooter's thumb for fast access. As with all of the controls on the MPX the fire selector is present on both sides, making this SMG a great choice for a left-handed skirmisher or an experienced skirmisher who likes to be able to shoot from either shoulder to make the most of the surrounding cover. 

The familiarity continues with the magazine release, which is positioned on the magazine well on both sides of the MPX. This is a push button style design and is very similar to an M4/AR15, meaning if you have experience with the M4 platform you will feel right at home with the MPX in your hands. 

The mock bolt release catch is also present on either side; with an M4/AR15 style “ping pong paddle” on the left side, and a push button on the right just above the mag catch. The right side bolt release sits nicely within reach of the trigger finger, which is one of the more enviable aspects of the real MPX design. We wish more M4s had this built in, but for now the MPX will have to do! 

Once again, the charging handle of the MPX is located in the same place as it is on the M4/AR15; at the top rear of the receiver. If this wasn’t a good spot for a charging handle we would suspect Sig of copying Armalite's homework! 

The difference between this and the standard M4 charging handle is its ambidextrous functionality, presenting two release tabs, one on either side which allows you to pull the charging handle with a single finger, whether you are left or right-handed. The charging handle does not need to be pulled to load the first BB, but it is used to lock the alloy mock bolt carrier back to allow for HOP-up adjustment. 

The HOP-up unit of the MPX is located inside the ejection port on the right side of the SMG, and is accessible when the charging handle is pulled back and the mock bolt is locked to the rear. This unit has a rotary style adjuster which is derived from the M4/AR15 rotary HOP-up, which is great news both for those who use their guns as they are and those who like to upgrade. 

Adjusting the HOP-up allows you to tune the MPX for different ammo weights and extend the range of your BBs by applying backspin. With your HOP-up set so your BBs fly as straight as possible, you can release the mock bolt using the bolt catches on either side, and close the dust cover too if you are super tactical!

To assist in speedy reloads the MPX has an extremely wide magazine well flare, practically guaranteeing that you will never fumble a reload. The magwell flare also allows for easy and fast “eyes up” reloads with a bit of practice, making the MPX a great primary for the CQB specialist. On either side of this massive blank canvas of a magwell we can find some lovely engraved SIG trademarks matching the real MPX faithfully; one of the many perks of an officially licensed replica! 

Like the magazine well, the trigger guard is also enlarged to allow for fast access to the trigger, even if you are wearing thick gloves. The pistol grip is a redesigned M4/AR15 AEG style motor grip with a Sig Sauer logo on either side and effective gripping texture on the sides and linear texture on the front and rear. This grip is set at a more vertical angle than most M4/AR15 grips to allow for more comfortable shooting with the stock fully collapsed and with more modern shooting stances.

On either side of the receiver we can see recesses designed for the original sliding MCX/MPX stock system, giving you the option of installing a sliding PDW style stock to the MPX for a different look. 

The stock attachment method of the MPX is known as the “1913 rail stock attachment system”, which basically uses a 20mm Picatinny rail to mount the stock. This gives you a wide variety of aftermarket stock options to choose from, including simple skeletonised stocks for reduced weight, visor stocks for more comfortable use with large full face protection and even M4/AR15 stocks which can be mounted with a 1913/20mm Picatinny buffer tube adapter and buffer tube. 

The stock provided with the MPX is the latest MPX/MCX design and works similarly to the M4/AR15 carbine buffer tube stocks. The stock is adjustable for length of pull, and the high density fibre stock body can be slid along the stock rail to suit any body type and users of large and bulky tactical vests. The stock can be adjusted by pressing the small catch on the bottom of the stock and siding the stock into the desired position where it will lock into place. 

This stock can also be folded to the side for transportation and extreme close range encounters, and all you have to do to achieve this is to brace your thumb on the top of the stock and lift it upwards, after which it can be folded. To redeploy the stock from the folded position, simply pull it out. How is that for slick?!

Built into the body of the stock we can find a QD sling socket on either side, allowing for a QD sling setup to be mounted for those who like to switch weapons in a flash mid skirmish. The stock also sports realistic SIG SAUER trademarks which look great with the other trades on the body and pistol grip. 

On the inside, the MPX has a lot to shout about and uses a standard version 2.1 gearbox with full compatibility with aftermarket upgrades. As it comes the MPX is equipped with a VFC Avalon steel gearset which runs on 8mm bearings for smooth, unlaboured functionality. The MPX has a MOSFET prewired inside the gearbox to protect the trigger contacts, meaning no semi-auto lockup when you are being fast fingered in CQB, and some useful protection for the circuitry which will prolong the life of the AEG considerably.

To make matters all the sweeter, this is the SMG of choice for John Wick, albeit in pistol calibre carbine form, and is also being used by the US Army in the form you see here, and in the subcompact 4.5-inch barrelled variant. An up-and-comer, and potentially a game changer, the MPX from SigAir is the sure choice for a 21st-century submachine gun!

Features

  • Full metal construction
  • Licensed SigAir product
  • John Wick's SMG of choice!
  • M-LOK handguard - Ultra modern accessory attachment interface
  • 20mm Picatinny receiver rail - Ready for red dot sights/scopes
  • 14mm CCW male threaded outer barrel - Tracer/suppressor ready!
  • Monolithic upper receiver - Uninterrupted optics rail, very strong design
  • Realistic SIG trademarks on the receiver, pistol grip and stock
  • 1913/Picatinny stock attachment - Swap your stock in seconds!
  • Ambidextrous fire controls - Great for left or right-handed users
  • In-line MOSFET pre-installed - Prolongs the life of the trigger contacts
  • QD Sling sockets on either side of the stock - Ready for QD sling swivels
  • Ambidextrous charging handle - Easy access for left or right-handed users
  • Rotary HOP-up unit - The latest M4/AR15 style design
  • Front wired - Mini-Tamiya battery connector - Recommended battery
  • Ergonomic SIG pistol grip with refined grip angle - More comfortable for modern shooting stances
  • Slim adjustable stock design - Easy to carry when folded, very low profile
  • Version 2.1 Gearbox - VFC Avalon Steel gearset, 8mm bearings
  • Aftermarket 1913/20mm stock options: Airsoft Artisan Buffer Tube Adapter |  Airsoft Artisan Shorty Stock

Package Includes

Special Instructions 

The barrel base of the MPX is threaded and as such, it may unscrew as you remove your muzzle device. This is normal, and the barrel can be screwed back into place if it does unscrew. 

Specification

General

Weapon Construction External
Weapon Type
Submachine Gun
Over 18 Only Icon
Over 18
Yes
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
Yes
Screwdriver Icon
Pre-Built
Yes
Package
Included Items
Magazine
Skill Level Icon
User Skill Level
Starter, Regular Player,
Patrol Base - Warning Icon
Warnings
Li-Po - Never Leave Charging Unattended
Li-Po - Only Use Approved Chargers
Li-Po - Charge in a Fire Safe Area

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.54kg
Weapon Length Collapsed
Length (Collapsed)
42.5cm
Weapon Length Extended
Length (Extended)
63.5cm

Construction

Colour Wheel Greyscale
Primary Colour
Black
Two Tone Icon
Pre Two-Toned
No
Construction Icon
Construction
Aluminium handguard, alloy receiver and outer barrel, polymer stock and pistol grip.
Weapon Construction External
External Construction
Polymer
Alloy
Aluminium
Steel
Gearbox Icon
Internal Construction
Polymer
Alloy
Aluminium
Steel

Weapon Specific

Power Source Icon
Powered By
Electric
Blowback Icon
Blowback
None
Weapon Platform
Submachine Gun, Sig MPX,
Magazine Style Icon
Magazine Style
Long Gun Magazine, Submachine Gun, Sig MPX AEG,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Ambidextrous
Weapon Configuration Icon
Weapon Configuration
Standard
Weapon Scale Icon
Weapon Scale
1:1
Suggested BB Weight
0.25g

Hop-Up

Hop-Up Unit Icon
Hop-Up Unit
Yes
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Rotary
Hop-Up Unit Location Icon
Hop-Up Location
Behind mock bolt carrier, accessible when the charging handle is pulled and the mock bolt is locked to the rear.

Furniture

Weapon Furniture Icon
Furniture
  • Folding Stock
  • Railed Receiver
  • Ambidextrous Charging Handle
  • Ambidextrous Magazine Release
  • Sliding Stock
  • Ambidextrous Fire Selector
  • Ergonomic Pistol Grip
  • M-LOK Handguard
  • 1913/Picatinny stock attachment
Rail System Icon
Rail System
20mm RIS / RAS , M-LOK Rail system,
Icon Stock Positions
Stock Setting
Sliding , Multi-Position , Folding ,
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
None
Sling Plate Icon
Sling Options
Stock , QD ,

Barrel

Outer Barrel Length (in)
8''
Icon Thread Type
Outer Barrel Thread Type
Male
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
14mm
Inner Barrel Diameter
6.08mm
Inner Barrel Length
168mm

Magazine Specific

Magazine Type
Medium Capacity , AEG,
Magazine BB Capacity
Approx. 100 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Top

Electric Gun Specific Information

Gearbox
Gearbox Icon
Gearbox Version
V2 Gearbox
Wiring Icon
Gearbox Wiring
Front Wired
Spring Change Icon
Gearbox Quick Change Spring
Yes
Digital Trigger Icon
Gearbox Electronic Trigger
Yes
Motor
Airsoft Motor Icon
Motor Type
Standard
Battery Specific
Battery Connector
Patrol Base | Icon | Mini Tamiya
Mini Tamiya
Compatible Battery
Compatible Battery Type
Li-Po
Compatible Battery Configuration
Stick
Compatible Battery Voltage
7.4v

Product Testing Data

Notepad Icon
Test Description
350 FPS +/- 10%
Notepad Icon
Tested Using
0.2g ASG BLASTER
Notepad Icon
Test Date
04/10/2022

Size guide

Joule Charts

Special Instructions

These table can be used as a reference to see if the BB weight you are using will be over acceptable Joulage limits at some Airsoft Sites in the UK. To check if the weight can be used chrono your weapon using the BB you intend to use, and then compare it to the chart.

FPS, Power and Joule Limits can vary from site to site, so please get in touch with where you're going to play with in advance to avoid disappointment.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, with a 350fps limit for Automatic Replicas, 400fps for Semi-Automatic Replicas, and 500fps for Bolt Action Replicas.

Tap the tabs below to open the relevant chart for your replica.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, and is the equivalent of 350fps, using 0.20g BB resulting in an upper limit of 1.14j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
325 0.98 1.23 1.37 1.47 1.57 1.77 1.96 2.11 2.21 2.45
328 1.00 1.25 1.40 1.50 1.60 1.80 2.00 2.15 2.25 2.50
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
335 1.04 1.30 1.46 1.56 1.67 1.88 2.09 2.24 2.35 2.61
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
345 1.11 1.38 1.55 1.66 1.77 1.99 2.21 2.38 2.49 2.76
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
355 1.17 1.46 1.64 1.76 1.87 2.11 2.34 2.52 2.63 2.93
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 400fps, using 0.20g BB resulting in an upper limit of 1.49j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 500fps, using 0.20g BB resulting in an upper limit of 2.32j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90
420 1.64 2.05 2.29 2.46 2.62 2.95 3.28 3.52 3.69 4.10
430 1.72 2.15 2.40 2.58 2.75 3.09 3.44 3.69 3.86 4.29
440 1.80 2.25 2.52 2.70 2.88 3.24 3.60 3.87 4.05 4.50
450 1.88 2.35 2.63 2.82 3.01 3.39 3.76 4.04 4.23 4.70
460 1.97 2.46 2.75 2.95 3.15 3.54 3.93 4.23 4.42 4.91
470 2.05 2.57 2.87 3.08 3.28 3.69 4.10 4.41 4.62 5.13
480 2.14 2.68 3.00 3.21 3.42 3.85 4.28 4.60 4.82 5.35
490 2.23 2.79 3.12 3.35 3.57 4.02 4.46 4.80 5.02 5.58
500 2.32 2.90 3.25 3.48 3.72 4.18 4.65 4.99 5.23 5.81
510 2.42 3.02 3.38 3.62 3.87 4.35 4.83 5.20 5.44 6.04