Originally Posted by six_storm
Well, here's how I look at it (sorry for the simplicity). I see an enemy, place my crosshairs ANYWHERE on him and fire. I don't have bad aim (unless I try to play at 3AM and I'm tired). Even watching other people fight after I'm dead, they can shoot 6-9 feet BESIDE the other person and still hit them. WTF? Btw, Hitboxes suck.
Always aim for the head no matter which gun you're using, it will always do the most damage. Also as mentioned before, also shoot in small burst. The AK47 for example has horrible accuracy but, can still quick lethal in medium range situations if fired in smaller bursts. It is of course extremely deadly at close range though.