Just make sure the barrel length on the American conversion kit is long enough to be non-restricted in Canada, or else you may be wasting your money on a kit that would make your gun restricted. From what info I can find on the manufacturer's website, the carbines sold in the states have 16 1/4 inch barrels. I can't find any specs on the American conversion kits, but they most likely have barrels that short as well. If that's the case, then a Canadian source may be the best option after all, despite costing more.