They were doing a myth about old western movies and shooting the guns out of the bad guys hands with no injury. That's an interesting topic on its own. But my question was they had to modify a gun to test the myth, I wonder if they got approval from BATF? They essentially welded two guns together to get an equal but opposite reaction from the gun blast. Is this legal? I was wondering this while I was watching the show. This is a really gun friendly show, with no disparaging comments toward gun owners. Did anyone see this episode?