

- Complete V3 AK gearbox
- High-torque motor included
- Compatible with AK-47/74 AEGs
Fix up your old AK AEG on the cheap with the CYMA V3 Sport Gearbox w/ Motor for AK-47/74 AEG; Rear Wired! This is the same gearbox that is used in the cheap but reliable CYMA Sport series, a favourite for beginner players and regular skirmishers looking for a reliable and affordable backup.
Inside, we find 18:1 ratio steel gears running on 7mm steel bushings, a polymer piston with a robust full steel tooth rack and a quick-change spring guide for easy power tuning. Being made to the CYMA "Sport" spec, we expect this gearbox to output around 380 FPS when installed, so a reduced power spring (M90, M100 or M110) is recommended. Thankfully, the quick-change spring system makes spring swaps a piece of cake!
If your AK AEG has failed and you don't know what's causing it, replace the whole gearbox, and then you can be sure that all the components are completely new and guaranteed to work with each other effectively!
Fast Delivery
Delivery & Postage
Here at Patrol Base, we send all our packages from our Warehouse based in the UK with the exception of European Warehouse Items. All of our parcels are sent with specially picked couriers to ensure your parcels get to you on time and in one piece.
For more information 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 3-5 day Standard
£6.95
From
Dispatched with 24hr UK mainland
£8.95
From
Highlands / Islands
£24.99*
From
* Please note that Scottish Highlands, and Islands postage prices can vary wildly. Please refer to the Postage Calculator at the basket for the lowest possible price.
Returns
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.
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
Features
- Complete V3 AK gearbox - CYMA "Sport" spec
- Drop-in installation - All parts included & pre-installed
- Rear-wired - Mini-Tamiya battery connector pre-installed
- Standard motor included - Ready for shooting!
- Quick change spring system - Easy power tuning, no need to open the gearbox
- Compatible downgrade spring: Bolster Armouries Premium AEG Spring
- Internals:
- 18:1 Steel Gears
- 7mm Steel Bushings
- Quick-change spring guide
- Cut-off switch trigger (standard contacts)
- Compatible with most AK-47/74 AEGs
Package Includes
- CYMA V3 Sport Gearbox w/ Motor for AK-47/74 AEG; Rear Wired
Specification
General
Parts & Accessories Type | Electric Internal Parts |
|---|---|
Internal Part Type | Complete Gearbox |
Warnings | Parts Fitting Unique Part Upgrade Parts |
Weight and Dimension
Weight (KG) | Approx.0.8KG |
|---|
Construction
Item Colour | Grey, Blue, |
|---|---|
Construction | Alloy shell. Steel gears & bushings. Polymer piston with steel tooth rack. Alloy trigger. Polymer nozzle & tappet plate. |
Internal Part Construction | Polymer, Alloy, Steel, |
Part Specific
Part for Power Source Type | Electric |
|---|---|
Platform | AK |
Platform Type | Assault Rifle |
Package Includes |
|
Electric Part Specific
Gearbox Version | V3Gearbox |
|---|
Motor Specific
Motor Type | Standard |
|---|---|
Motor Shaft Length | Short |
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.


