Spring set for gearbox M4/V2 [CYMA]

Must have

The CYMA Spring Set for M4/V2 gearbox is a very small but surprisingly important maintenance kit for any AEG owner working on a Version 2 gearbox. It includes several tiny internal springs used for components like the trigger system, selector, tappet plate, and cutoff lever, which are often lost or weakened during disassembly.

In terms of build quality, the springs are made from standard steel and feel consistent with OEM replacement parts. They are not performance upgrades, but rather reliable spare components that restore normal gearbox function. The set is especially useful during maintenance or upgrades, when small original springs are easy to lose or wear out.

In practice, having this kit on hand can save a lot of frustration, since even one missing spring can stop the entire replica from working properly. Installation is simple for experienced tech users, but opening a V2 gearbox is still required.

Overall, the CYMA spring set is not exciting, but it is extremely practical. It is a cheap, essential backup kit that helps keep an M4 AEG reliable and field-ready.

It is a perfect replacement for M4 springs.

Lets be honest, we all had a spring that just launched itself across the room, and of course nowhere to be found EVER AGAIN!

Well this kit will spare your knees from looking for that one little spring. If you are upgrading your gun this set is a MUST have. Better stock up on it before catastrophe hits, and you are left without your gun for the weekend just because the cutoff lever spring is missing.

I can recommend this in every season of the year: summer, autumn, winter and of course SPRING.

A set of very good springs. There is even a motor height adjustment spring. However, I got them just for one spring: tappet plate return spring. It's very strong. It helps if you have a very high ROF setup in your gearbox or if you have a very tight O-ring in your air nozzle.