would be helpful to read tghe rules here, you've already broken a couple of them.
But as for <200$... cyma or jg guns are pretty much the only thing I'd look at. 200$ for a combat machine m4 but a king arms m4 is not much more and a more worthy espense imo. The gearboxes in the combat machines are not very strong.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.