What unit are you? We charge hills all the time. In war,
defensive positions are often around hills, maybe not right at the
top, but usually not right at the bottom either. So if you are not
charging up the hill to take the enemy position, it's fire and
movement. Don't think it's possible to fire the GPMG on the move
accurately, an if it's not accurate, does it really matter how good
the firepower is?
Sure, a skinny guy can carry the GPMG, but to charge and fire or do
fire and movement, let's face it, not very practical. Again one
hand on grip pulling trigger and the other holding the belt to make
sure it doesn't get tangled? all the while running, taking cover,
rolling, proning, getting up, etc... No fishing way.