Description
Double Eagle x Aeroknox M4 with Wireless ETU (Metal – M920A – Black)
The Double Eagle x Aeroknox M4 (model M920A) is a black, metal-bodied M4 airsoft electric gun (AEG) produced in collaboration with Aeroknox, the American firearms accessory company known for its AX-15 style handguards and rail systems. It combines the familiar handling of an AR-15 platform with a modern, slimline Aeroknox-style front end and an app-programmable electronic trigger unit.
Double Eagle has built a reputation for offering well-equipped replicas at accessible prices, and the M920A is a good example: you get an aluminium handguard and lower receiver, a Version 2 gearbox, a MOSFET-equipped ETU and ambidextrous controls, all in one package. It is a sensible choice for players who want a modern-looking M4 that is ready to customise.
Build and materials
The replica is of metal construction, with an aluminium lower receiver and an aluminium AX-15 style handguard. The handguard has M-LOK slots at the 3, 6 and 9 o’clock positions and along part of the top, so you can fit rail sections, torches, grips and other accessories exactly where you need them while keeping the front end slim and light.
A flat-top Picatinny rail on the upper receiver provides room for a red dot, holographic sight or magnified optic, and flip-up front and rear sights give you a back-up sighting option. The textured, ergonomic pistol grip and straight, flat-faced trigger help with control and a consistent trigger pull.
Performance and internals
Inside is a Falcon Version 2 gearbox, fitted with a quick-change spring system and 8mm steel bearings. The Version 2 design is the most common AEG gearbox, so upgrade and replacement parts are widely available. The quick-change spring lets you swap the main spring without stripping the gearbox, which is handy if you play at sites with different power limits.
Hop-up is adjustable through a rotary hop-up unit, allowing you to fine-tune backspin to suit your BB weight and get the most range and accuracy from the gun.
Wireless ETU and MOSFET
The headline feature is the Eshooter Kestrel V2 electronic trigger unit with built-in MOSFET. An ETU replaces the traditional mechanical trigger contacts, giving a crisper, faster trigger response and avoiding the wear and burning that mechanical contacts suffer over time. The MOSFET also helps protect the trigger circuit.
The Kestrel V2 can be set up through a phone app on iOS or Android, which is what gives this model its wireless ETU name. Depending on the settings available in the app, this lets you adjust how the gun behaves without opening it up.
Handling
The ambidextrous fire selector offers Safe, Semi and Auto positions and can be reached by both left- and right-handed shooters. With the M4’s compact size and familiar controls, it handles well in both woodland and CQB environments.
Key features
- Double Eagle x Aeroknox collaboration
- Metal construction with aluminium lower receiver
- Aluminium AX-15 style handguard with M-LOK slots
- Eshooter Kestrel V2 ETU with MOSFET
- App control via iOS or Android
- Falcon Version 2 gearbox
- Quick-change spring and 8mm steel bearings
- Adjustable rotary hop-up
- Flip-up front and rear sights
- Ambidextrous fire selector (Safe / Semi / Auto)
- Flat-top Picatinny rail
- Straight flat trigger and textured grip
Compatibility
As an M4-platform AEG with a Version 2 gearbox, the M920A benefits from the wide range of M4 accessories and V2 internal parts on the market. The M-LOK handguard accepts M-LOK rail sections and accessories, and the flat-top rail takes standard Picatinny/20mm optics mounts.
Battery type and connector are not specified here, so please check with us before choosing a battery. Magazine fit can vary between brands; we recommend checking compatibility before buying spares.
Care and maintenance
Always unplug the battery after use and store it separately from the gun. Clean the inner barrel regularly with a cleaning rod and a lint-free cloth to keep accuracy consistent, and use good quality seamless BBs to protect the hop-up rubber and barrel.
Avoid firing the gun dry for long periods, and if you change the spring, make sure you stay within your site’s power limits. Keep the ETU’s app settings sensible and check firmware or settings guidance from the manufacturer before making changes.
Who is it for?
This M4 is for players who want a modern, slim and well-specified AEG with app-programmable electronics, whether as a first serious rifle or a platform to build on.
Please note: Battery and charger are not included. Always wear suitable eye protection when using airsoft replicas.
