I don't see it as vague, actually. If it looks like a pistol, with no additional wood or material attached behind it, it is a propsed banned weapon.
They list the pistol grip and the folding or telescopic stock as these make the weapon more easily concealed.
You take that 11-87 Premier with the 28" barrel and hide that in your coat. You'd have to be 7' tall with a LONG trench coat to be able to hide it. And that is standing still!
To the comment that a shotgun is an odd gift. In some parts of the country, that is a gift that shows a lot of respect and admiration.
Growing up in a hunting household, the gift of a gun when I was young was a sign that my father respected and trusted me. It was a great feeling to know that my father believed that I was grown up enough to be trusted with a firearm.
This was not a gift that was given and left alone. This was after YEARS of growing up respecting and learning about guns. In most gun-owning households, you learn early how to properly care for, secure and use a firearm. That is all with great respect and conciousness of what they can do.
Ted