I have never had a problem, yes USPS. I believe because they are antiques, it changes their classification. I have had guns sent by some of the big dealers this way so it must be OK. It is the same that they can send black powder percussion guns, even though they are new reproductions, with out going through a export agent, just put them in thw mail. I know several people who have done this with places like Dixie Guns, pistols and rifles. 

They say a week to get here, but I have had them held up in places like Chicago mail exchange. No reason, they just seem to take a long time to clear at times. But as you now get a tracking number you can se where it is. 

All mail is Air Mail now, no overseas sea mail anymore. It's about $100 to mail a long gun to Oz. 

I had my fathers WWII hand guns sent to me when he passed, they went USPS, as well. It was a few years ago though.

Hello guys.

Thank you very very much for all your input to my questions. 

Now I have to sort all the information, have to contact the buyer and seller about details, have to write some mails to the mentioned persons and have to get some authority infos about the import of pre-1870 ML-rifles and the tax situation.
 

Thanks again!

                             Biggi. 

CMM, you are forgetting about the export.  If it's going to cross a border, the GCA is no longer in control.

Q: Does a licensee need an export license to export a firearm?
The GCA does not require export licenses. However, most firearms and ammunition must be exported in accordance with the provisions of the Arms Export Control Act of 1976. Regulations implementing this Act generally require a license to be obtained from the Directorate of Defense Trade Controls, Department of State, PM/DDTC, SA-1, Room 1200, 2401 E St., N.W., Washington, DC 20037; (202) 663-1282.

The export of sporting shotguns and ammunition for sporting shotguns is regulated by the U.S. Department of Commerce rather than the State Department. An export license is generally needed to export these shotguns and ammunition. For further information, contact them at their nearest district office or the Bureau of Industry and Security, Outreach and Educational Services Division, U.S. Department of Commerce, 14th St. & Pennsylvania Ave. N.W., Washington, DC 20230, (202) 482-4811.

When exporting NFA firearms, ATF Form 9 must be completed and approved by ATF prior to export.

[22 U.S.C. 2778, 27 CFR 479.114 and 479.116]

here's the link: (You need to Login or Register to view media files and links)

DOS Arms Export Control Act: (You need to Login or Register to view media files and links)

And then there is ITAR:  (You need to Login or Register to view media files and links)

Biggie, don't let the above scare you.  As long as it's pre-1898, single-shot (this is a single-shot forum) and clearly labeled during shipment, ship it.