I would like to hang and display some replica black powder revolvers that my dad had purchased. He kept them in their boxes locked in a gun cabinet. Obviously, safety is first concern but I'm not sure if these would fall into the category of a firearm?? He passed away in October and I am creating a sort of tribute wall in his honor and I have bows that he built and other hunting and archery items on display and would like to add these revolvers. Any thoughts appreciated.