Just compare the reload times of all 3 mp5s, You probably can't tell the difference when actually playing, mind you, but the thing that ticks me off is the HA-TCHA ninja chop action. Besides that, the fact that you waste ONE ROUND in order to get a full mag is like trying to compare the lifspan of a light bulb being shortened every time you open the current. If wasting one round really bothers you, don't reload after every 3-6 round burst, why not try and keep track of your shots and reload when you have too.
Seriously tho, every time I'm dead all I see are people walking around... the spot an enemy, shoot them dead with one burst and... reload. You know, the ammo you get doesn't add up in the end, you still have that same used clip. I really enjoy wating one of these compulsive reloaders near the end of every mag and go <fire><fire><fire> <click> <reload> <fire><fire> <click> <re.... die>