You too can now own your own whaling harpoon. I’m not even sure what the legalities are. I would imagine it’s a destructive device. It’s also in Norway. It’s not impossible to get a destructive device imported, but I can’t imagine how much paperwork you’d have to do to get this into the country, and in your legal possession.
UPDATE: Actually, looking at how they work, I’m not sure it’s a destructive device, and may not actually be regulated at all.