The United States is the largest market in the world, and the 3rd largest country. In order for any foreign firearm company to tap into that market, the US governement requires them to have manufacturing facilities and employ Americans. Canada, isn't even on the radar for these firms.
This has NOTHING to do with R Nicholls or your perceived lack of care from said company. This has EVERYTHING to do with national politics and market forces. That's it.
The few times I've had to deal with R Nicholls have been good experiences. The bad parts have been limited solely by governement red tape. It sucks, but it's mostly foreign politics and nothing else.
You know in FN's case, it's Belgian politics that limits the sale of what is considered military equipment to anyone. Governments as a general rule, do not want you running around with this stuff. Canada is so very open, I didn't understand myself until I dug into it.