man it all comes down to basic marksmanship principals. 2-3 round bursts, aim for the head if ya close enough, but if ya a bit further aim for the centre of seeing mass.
and if ya really close give em a mag in the face!
it all depends on the weapon and the spread of the shots, weapons that tend to spray just aim for the body, but the rifles and any weapon up close aim for the head.
and always strafe, circle, duck, and lead (even jump!)
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