Although your customers action was inexcuseable, I feel your reaction was just as bad. He may have just been ignorant & stupid (obviously), but you know better. What's one of the major gun safety rules-Never point your gun at something unless you intend to kill it. Accidents happen. What if your Glock had an accidental discharge? It sounds just like gang wars-they did it to us, so we'll do it to them. Of course, I wasn't in your position, but I think if a customer pointed a rifle at me like that, I'd like to think I'd grab the muzzle end of the barrel, direct it to the side, and in no uncertain terms advise the idiot that he's an A Hole.