M2 Carbine said:
...If the guy is close and coming at you with the apparent will and means to do you great bodily harm, a real threat does actually exist. This still doesn't mean that you HAVE to kill him if you are CAPABLE of stopping him with a less deadly shot...
But how do you know what will stop him?
[1] People have continued to fight and even kill an opponent when suffering grievous, even mortal, wounds.
[2] No wound, except one causing significant damage to the upper spine or brain, is sure to quickly stop a fight. And such a wound will cause death or grave disability.
[3] The point is never to kill. It's to stop. But the reality is that wounds most likely to most quickly incapacitate an attacker by causing him to be physiologically unable to continue the fight also have the most potentially to ultimately be fatal.
[4] Less severe wounds may or may not stop an attacker. They will only stop an attacker if he chooses to stop after recognizing that he is wounded. They will not cause him to be physiologically incapable of continuing to fight. And such a wound may still be fatal (e. g., a shot to the leg which cuts the femoral artery).
[5] You might hit an attacker's leg, or otherwise cause him a minor wound, because you miss your COM shot. But are you good enough to reliably intentionally deliver a minor wound under stress?
[6] Bottom line is that if an attacker stops upon seeing your gun or after suffering a minor wound, that is a good result. But you can't count on his stopping.
M2 Carbine said:
...Chances are I didn't fall asleep after I shot him in the leg, so then if need be, I would put a couple in him COM....
If you still have enough time after taking the time to try to place a shot in your attacker's leg. And if you actually had managed to hit him in the leg under the stress of the encounter.