There are SO many techniques you could learn, but none you could grab in a 3 minute read online.
The simplest thing I can say is:
Think laterally. Don't get involved in a pin-down between you and another person. Staying still will allow them to flank and pick you off while you are busy trying to get "that one guy"...
For the most part: stay moving. a still target is easier to hit.
If you are playing long enough rounds that you will need to reload in the midst of battle, don't go in to a gun fight without enough ammo to support that particular engagement. . sucks to run out of ammo and they are still loaded!
Ray
