well just as people suggested before, and what you said, it runs a ver 2 gearbox, so its extremely easy to interchange, why would u not do it right off the bat? from what ive experienced, all ACM companies VER2 gearboxes suck out of the box.
from what i remember, I had an A&K masada before the big cybergun/magpul licencing problems with A&K and the grease was just nasty. my brother had to regrease the whole damn thing, twas one nasty Son of a bitch. and during that time, G&P actually had a custom G&P upgraded version for a limited time, those were the ones that ran way better than the A&K gearbox versions
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