::Edit:: it's been a few years as I stated. After talking to someone that was at a recent show it sounds like SC now requires all the paperwork to be filled out at shows so it will not be an issue. It was more than likely in place even years ago when I last attended but I bought a used rifle from an individual then so it would explain the lack of paperwork.
For curiosity sake, would a used lower from an individual cause issue? They are so inexpensive that I would probably not buy a used one, but curious anyhow.
Sorry for a dumb post, just wanted to make sure that I did not mess up.