Yes it is "overpowered" i use it all EVERY time i play mw2, but seriously? people complain about everything, the only thing i complain is about WHAT is actually unfair, like noob tubes, commando, campers etc... I bet that if everyone were using Mini-Uzi (which is also great if you know how to use it) everybody were like "OMG Mini Uzi is so overpowered!" but yeah will happen with EVERY cod games, you have to realize that IS not that they are soo overpowered, it is because MOST of the pros use that gun (note that in every COD game it is a SMG that is "overpowered") because pros don't like to camp, and that's why they don't use assault rifles in most of the time.
COD4 = MP5 overpowered lol?
COD5 = MP40
MW2 = UMP
BO i guess it will be MP5 again
See? you don't see "any" assault rifle there, PROs just like to move fast, and use tactics to actually kill anyone from long and short distance, if i see you with the SCAR-H and i have the UMP long distance, and im not gonna face you, but then i go near you and kill, and you will say it is way overpowered why? because i just used a tactic, and if you have compare SMG vs Assault rifles, SMG as faster, therefore if your a pro, you can shoot first before they can even aim