Originally Posted by MoreToasties
I know FPS is a big deal, but the UMG will eat up my current budget, so no upgrades for a while, and I want to be able to game it right away.
Velocity is not a big deal. The only 'deal' with it is the limits set, and your gun can't exceed that. For CQB, that's 350 fps MAX, and in most of Canada, that's 400 fps for outdoors, although some places will allow AEGs up to 420.
And if you want something customizeable with easily available parts, accessories, mags, etc, you'd probably be better off with an MP5 than a UMG. UMG mags are harder to get, and pouches for them are nearly non-existant (won't fit in the majority of MP5 pouches).