Just to further complicate things, our postal service will not accept firearms from another country.The only method available is to ship it via air freight and you don't want to go there, trust me.... The best route is what Jerry said. If it's an antique in the U.S., have it shipped to a U.S. border town and have a Canadian pick it up and take it to the border and sort it out with Canada Customs.

Better to keep your mouth shut and be thought stupid,than open it and confirm.