This is for CoD4 and 5.
This isn't the class you kick a lot a butt with (although it could be). Just the one that is most innovative
or something, etc.
For example, mine is: Tank Hunter:
Gun: Gewehr, Appertured (this gun can't be beat when it comes to accuracy, so naturally, I use it to kill the Turret guy. It's so simple, because the tank is either stopped, or going in a straight line when he pops out. So I just aim it up, and unload. [I might change to Ppsh-apperture, once I unlock it] I'm still experimenting. PLUs, I can get kills with it too!)
Sidearm: Magnum, or Tokarev. (Right now, I'm trying to get pistol kills so I just whip that out, and tear people up.)
Nade: Sticky. (The Best for Tank killing)
Special Nade: Smoke. (I never use it, but I think if I ever needed to, this'd come in handy)
Perk 1: Satchel Charges. This is SO much better than n00btubes, Bazookas, and 2 Nades for tank killing. Just get one of those satchel under the tank, and it's gone. It doesn't matter how much health they have. Plus, two STUCK on the tank, will completely molest tanks too.)
Perk 2: Fireworks. (self explanatory)
Perk 3: Extreme Conditioning (For getting to the tanks, obvously) :)
^ Yeah, I'm AWESOME with this class too.
-Sig credit goes to PhilXZ. The pic of Kairi's head was cropped by Rathalos9. Apparently no one else can crop Kairi's head...