This topic is a semi common occurrence with many americans entering Canada that think the US constitution follows them around when crossing borders, as a few will always test the threshold upon not getting caught.
I read a couple years ago that one of the Canada Customs statistics in a one year timeframe with undeclared firearms in possession were the majority of offences from male individuals over the age of 55 as you better believe the Canada Customs agents tend to look a little harder for those individuals in that age group at their discretion.
Every Canada border station I approached at upon their port of entry has a sign that clearly reads : All firearms and weapons must be declared
Whether the firearm(s) a person has onhand are classified as permitted, restricted, or prohibited, they still need to be fully declared (even not knowingly possessing them as it is a zero tolerance if caught) or else one will be investing in a Canadian timeshare (meaning jail with fines and court costs), while losing the privilege of visiting Canada ever again.
Both Canada and US Customs number 1 concern upon individuals entering each country are possession of firearms and weapons, as both countries take this issue very seriously as the rules and regulations are very clear upon entry with such items.
