Help! CYMA MP5 041J gearbox upgrade

[MrKumar1]

Fellow airsofters,

 

Can anyone tell me which reinforced or any gearbox will fit in this gun aside from the factory one, as that one keeps braking. I use a strong powered spring about SP150 and it breaks after 6months or so. Which gearbox will (definitely) fit in this gun? I just want one that is a bit stronger that also fits!

 

CYMA CM.041J SMG-5 Submachine Gun (patrolbase.co.uk)

CM.041J BLUE Limited Edition [CYMA] | TaiwanGun US & EU

CYMA MP5 CM.041J (davescustomairsoft.co.uk)

 

The gearbox that comes with this gun are like those attached in the photos, black and grey. The JG mp5 gearbox does not fit as it has a slightly different shape, i.e the notch on top.

 

 

 

 

 

 

Above are the CYMA gearboxes that are that fit in my MP5. ^^^^^^^^

 

 

Above is some other mp5 cyma gearboxes ^ and the JG one, notice the top has a notch on it which sticks out! Look at the very top. Any advice will be helpful. Thanks

Edited January 25, 2023 by MrKumar1

[Lozart]

My first question would be why are you running an SP150 spring in an MP5?

[Kls77]

150!!!! Jesus ..... Pooorrrrr gearbox