Most important question. Anyone have any idea of legality?

!. For a real vintage Howdah? Do these class as antiques? Given they aren't meant to be shot if an "antique"?

2. Greater than .357 or 9mm - what sort of difficulties does this entail?

3. If a shotgun was cut back into one - would this be permissible per our authorities, ie turning a shotgun into a handgun/howdah? Somehow I think the authorities might not be able to get their minds around the concept of a sawn off shotgun ... ?