Well, you've gotten good advice from just about everyone. They agree that you will be better off to drive away. You are only allowed to use deadly force to confront deadly force when your life or that of another person is in imminent danger of death or grave bodily injury. If you pull a gun and the other guy calls the cops, you may be going to jail, lose your CCW license and your gun! Stay in your car, drive away. If you can't drive away, keep your gun out of view until you can accurately assess the other guys intentions. Remember, right or wrong you are going to have to justify your use of deadly force. Even if you are not charged with a crime, you very well may be sued and have to defend your actions in civil court. Carrying a loaded firearm is a serious responsibility, using it irresponsibly may ruin your life and that of your family.