H&K MP5 or MP5/10A (10mm...gives s'more of a punch)
Glock 18C (its an automatic pistol...yep, hold the trigger and its a continuous stream of bullets...just like a (sub)machine gun...18 round clip too, not bad.)
Never used either in real life, I'm just a big Rainbow Six: Rogue Spear player.
BTW, I didn't think that guns were supposed to be "cool"? :frown: