- Complete V2 Gearbox
- Fits most M4/AR-15 AEGs
- SHS Piston & reinforced tappet plate
If your M4 needs a revamp, a new gearbox is the easiest way to do it. The Delta Armory Complete Version 2 Gearbox for M4/AR-15 AEG is compatible with almost every M4/AR-15 AEG on the market and is well-equipped with reinforced parts straight out of the gate.
This is the same gearbox used in the Delta Armory CHARLIE™ line AEGs, boasting a quick change spring guide, 18:1 steel gears running on 7mm bushings, an SHS piston with a full steel tooth rack, an SHS reinforced tappet plate and a reinforced gearbox shell with radiused cylinder window corners.
The pre-installed spring will provide around 380 FPS when installed, so if you plan to use this gearbox for anything other than a semi-auto-locked DMR build you will need an M100, M105 or weaker spring to keep it within site limits. Thankfully, the quick change spring system makes spring swaps a breeze! Whether you are breathing new life into an old M4 AEG or you are building an AEG from scratch, this complete gearbox will save you loads of time and messing around!
Fast Delivery
Delivery & Postage
Here at Patrol Base we ship worldwide, delivering not only to the UK but to most of the EU and select Worldwide locations as well. We provide a working day-by-road service via our handpicked courier services, simply buy your Airsoft guns with us and we'll have them delivered directly to your door.
For more information and to see the country we deliver please check out our Delivery Information Page.
Estimates
Below are some rough postage prices for orders. Please note these are subject to change and are only a rough guide. For a more accurate postage estimate please use the Postage Calculator at the basket.
UK Standard
£6.95
Approx.
UK Next Day
£8.95
Approx.
Highlands / Islands
£24.99*
Approx.
Saturday
£14.95
Approx.
* Scottish Highlands, Islands, and EU post prices can vary wildly. Prices range from £8.99 to £29.99, so please ensure you refer to the Postage Calculator at the basket for the lowest possible price.
Returns
We want you to be delighted 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.
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.
For more information on returning products, and how to do it please visit our Returns Policy Page.
Description
If you need to fix up an old M4 but aren't up for messing around inside the gearbox, a complete gearbox replacement is the way to go. The Delta Armory Complete Version 2 Gearbox for M4/AR-15 AEG is the same gearbox used in the Delta Armory CHARLIE™ AEG range, boasting plenty of reinforcements and pre-upgraded parts straight out of the box.
Inside, you will find steel 18:1 ratio gears running on 7mm bushings, a quick change spring guide, an SHS piston with a full rack of steel teeth and an SHS reinforced tappet plate, giving you a long-lasting internal feature set and full compatibility with Tokyo Marui spec upgrade parts. The gearbox shell is also reinforced and the cylinder window is radiused at the front, getting ahead of known weak points in the version 2 design and allowing for far stronger springs to be used than with a standard V2 shell.
The pre-installed spring provides around 380 FPS when installed, so we recommend using an M100 or M105 spring to keep the muzzle energy of your build within site and legal limits. Thankfully, the quick change spring system makes switching springs easy; simply remove the spring guide through the rear of the gearbox and switch the spring for your alternative. The gearbox is also pre-wired in rear wired configuration, with a mini-Tamiya battery connector and spade connectors for your motor. Whether you are building from scratch or fixing up an old M4, this gearbox is the key to avoiding the fiddly nature of gearbox internals!
Features
- Complete V2 Gearbox
- Fits most M4/AR-15 AEGs
- Quick change spring system - Tune the power without opening the GB shell
- Delta Armory Flat Type A trigger - Great for semi-auto spam
- High power internal spring - Approx 380 FPS, we recommend swapping it for an M100 or M105
- Reinforced internal components -
- SHS Piston with steel full tooth rack
- SHS Tappet plate
- Quick change spring guide
- Steel 18:1 gearset
- 7mm Bushings
- Rear wired: Mini-Tamiya connector pre-installed
- Pre-wired with motor spade connectors - No need for soldering
Package Includes
- Delta Armory Complete Version 2 Gearbox for M4/AR-15 AEG
Specification
General
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Internal Part Type
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Complete Gearbox, Gearbox,
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|---|---|
 |
 Custom Parts
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Weight and Dimension
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Approx. 0.5kg
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|---|
Construction
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Black
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|---|---|
 |
Alloy shell, steel gears. Polymer piston with full steel tooth rack. Polymer quick change spring guide.
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Internal Part Construction
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Polymer, Alloy, Steel,
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Part Specific
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Part for Power Source Type
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Electric
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|---|---|
 |
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Package Includes
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Complete Gearbox
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Electric Part Specific
 |
V2 Gearbox
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|---|---|
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Gearbox Version Compatibility Variant
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Version 2
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Spring Specific
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Spring Approximate FPS
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Approx. 380fps, using 0.20g BB
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|---|
Bearing Specific
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Spring Guide Bearings
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No
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Size guide
Parts Fitting
Upgrades and Downgrades should only be undertaken by experienced players, or Airsoft Technicians. Please note, changing any internal parts of a weapon voids its warranty unless done in-house by our staff.
Please ensure that when fitting parts the part purchased is the correct part, as once a part has been fitted we cannot accept return.
We do know that players love to tinker, so we're here to give you help should you require it, and if needed you can get in touch with our workshop for more help!
Unique Parts
Please note that some parts may be unique to a specific brand of weapon. For example: Parts for an ASG M4A1 may not fit an ICS M4A1.
Parts from the same brand typically have a high chance of fitting, though be warned, some replicas use unique parts, so please ensure the part will fit before you attempt to fit it.
If you require help with fitting any parts feel free to get in touch with us via our Contact Us Page.
For more information with fitting parts, or should you require help, feel free to get in touch with our Workshop Department via our Contact Us Page.
Terms and Conditions relating to parts fitting can be read on our Terms and Conditions Page.