The federal government would IMHO have the authority to extend such punishments to people if they travel to other states (Fair Faith and Credit clause) but only in cases where the sentencing state imposed them. For the federal government to apply its own rules to when such a ban applies has no constitutional basis.
As for the 1989 import ban, it may be constitutional to restrict the actual importation of certain items, but I see no legitimate basis for restricting what people can do with the items once they've been legally imported.
Agreed. I may not like Bush the Elder's boneheaded gun hating and his "sporting purpose" clause, but the Constitution DOES give that power to the Feds.
Sucks TWICE because I'd REALLY love to get my hands on one of those Hungarian Gepards. Half the price of most .50BMG's, a bit more powerful and supposedly a bit more accurate as well. I'd love to get into 1000+yrds shooting, but can't afford a decent rig at todays prices.