Odd example, only a small handful of states restrict 50 BMG rifles e.g. "high powered sniper rifles", and basically none restrict the normal sort of rifles that

Odd example, only a small handful of states restrict 50 BMG rifles e.g. "high powered sniper rifles", and basically none restrict the normal sort of rifles that would normally be used by snipers. You can even go over 50 calibre with a background check and a tax stamp. Even with plastic explosives, basically anybody who isn't a fugitive, convicted felon or a drug user is allowed to get a federal license for explosives.