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Old April 11th, 2009, 12:31   #1
Join Date: Jan 2008
Location: Winnipeg
Can A JG M4 Gearbox withstand a madbull m120?

Hi, I own a JG M4 and I realized that it was a pretty bad gun, compared to the other people's gun's I play with. So I decided to upgrade my M4, and change it into an SPR. I bought several things, such as new hop-up, a tightbore barrel, a scope, etc.

But, I also bought a Mad Bull M120 Spring, to upgrade my FPS to around 400. But now that I think of it... Will my M4's gearbox break under the force of the new spring? If so, what can I buy to make my gearbox withstand it?
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