Even if it is not a realistic gun model or a very rare obscure one, they will still probably seize it. I would not risk it since the CBSA is known to be particularly incompetent when it comes to distinguishing firearms from perfectly legal parts... (they recently seized a gearbox claiming it was a gun - ask Conker).
Your best bet if you would try to buy one would be to buy it from one of the aged-verified retailers which has it in stock. Otherwise, you more than likely to end up on the CBSA blacklist of people which are "randomly" searched everytime they cross the border.
Last edited by BoGrain; December 8th, 2010 at 12:42..