This doesn't really have anything to do with concealed carry. You are at your house and you would be concealing nothing. First I would send the wife and boys out the back as she was dialing 911. I would be reaching for the fire extinguisher because as you say in your scenario, the rag is lit so you don't have much time but to try to minimize the damage to your dwelling and family. Now, provided with a little time, then I would be reaching for the Winchester Defender alternately loaded with 00 buck and 500 grain slugs to take to the party out front. You would not want to use anything but short range because if there are witnesses then you would most likely have neighbors and you don't want to be using them or their property for backstops. He needs at least two stern warnings that Ralph doesn't live here and if he continues to threaten then any force necessary will be used and that 911 has been called. The rest will play out by instinct at that point. The main thing is you wuld have the police on the phone as witness to your reasonability. With all that being said, no one in MT would bring a molitave cocktail to a gun fight anyhow. Everyone knows that all people in MT have guns and usually lots of them in their vehicles, houses, etc. :-laf