Jon is correct on the pre 1898 firearms as far as the ATF. A few years ago when I had my FFL/Importer permit I had a run in with a customs official at the Anchorage department. He kept telling me my 1880's shotguns were modern firearms since they would take modern ammo. He was removing the "or" instead of "and" between the 3 paragraphs that the ATF use to describe the conditions for antique status. I finally phoned the ATF and had the agent explain to the custom's official that he was doing it wrong for the last 20 years. He was not a happy camper. Made another official finish my paperwork to release them.