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You can buy it and ship it. Best way to ship is USPS because UPS, FED-EX and other courier services have a nasty habit of charging you a $40 ++ "Brokerage Fee". USPS is much cheaper to ship, and will deliver to your door or post office.
As mentioned, do not put "Bayonet" or "Military" on the customs declaration that the shipper/seller makes out at the Post Office. I like the "used knife" or "collectors knife" or something similar.
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