If you'd like to purchase a firearm in the United States, you're free to do so but will need to have it legally imported through a 3rd party. IRG and Prophet River are both decent companies to deal with. Before you purchase it's advised that you explain your citizenship to the US seller so that they don't feel blindsided when you tell them you'll be exporting the firearm from the United States into Canada. There is a degree of paperwork involved but it isn't extensive. The real factor you've got to take into account is the cost. When importing, you're going to have to pay the importer's base fee, freight to and from the American FFL as well as to Canada. You'll also need to factor currency conversion and tax at the boarder into the equation. The average import costs at least $500 when it's all said and done - and takes at least a couple months to have all the paperwork processed. SO... long story short, I'd really only advise going through the process if the item(s) is/are totally unattainable here in Canada. For something like a Russian revolver, the cost/time involved in importing would far outweigh the benefit of following through.
