There should be a lot of things to balance the weapon.
Make the range actually resemble the statistics, because I've seen people killing with it at sniping distances, and make it less accurate, so it sprays the bullets when firing. I don't want the weapon to be bad, I just want it to be used as it was meant to, at close range battles. Also, the damage is kinda acceptable, but obviously at the insane firing speed, it can kill in half a second or less. Maybe it can be nerfed a bit.