clarification of scenario
Clarification: you are not in a check-out queue immediately next to the gun-pointing man. You are perhaps 10 to 20 feet away, maybe in the food aisles unnoticed by the BG who is near the register. Or perhaps you have come in after it was underway, and the door does not make noise. By no non-belligerents behind him, that means no bystanders in line with your potential shot. You have a clear shot. You are not wearing noisy kydex, either. Let us assume that you have done what every CCW holder should do, which is studying the state law relevant to use of force, and you have trained regularly with your firearm.