'Useful Guns' have a tendency to become useless when the next DLC gets released. It's a vicious circle, and one I think a lot of people get forced into by the state of the casual guns and their balance issues.
I've brought a few myself and always regret it down the line. I hope you don't feel this way of course! But it does seem to be a evil tactic employed by those at COD HQ.
until