M140 spring...

hey just curious, would it be smart to put a M140 spring into a CYMA Thompson?

No

I can't imagine cyma makes their gearboxes out the toughest stuff, and the thompson is such that there isn't really an available replacement or reinforced option if the gearbox itself breaks which is entirely possible with heavy upgrades like that.

Also an M140 would put you way over the CVA FPS limits, which is 400fps for AEG's.

alright, i wont, i didn't think it would, the spring i have in the Thompson now works just fine. thanks