Noted that this is rather rare in Canadian schools

because, compared to the United States, firearms are illegal and the only ones that are allowed aren't even sold at Walmart or places like that, but in hunting stores, and you need a permit (like in some states, but the difference is that it's everywhere in Canada). and you can't walk around with it everywhere, and the only time it's legal to have a rifle is for hunting, and also to reduce the risk, it's illegal in Canada to modify your weapon, and more limited than certain guns in the United States, such as automatic weapons, etc. Note that I may be wrong about some things because I'm not a hunting enthusiast, etc., but what scares me the most is that I have a feeling this could become more common in Canada because of 3D-printed plastic guns, and they are also starting to create prototypes of 3D printers that use metal instead of plastic. Sure, there would be metal detectors, but they would be more resistant, etc.

And yes, I saw a video by a French YouTuber who was traveling in the United States, and he showed us guns at Walmart stores in the US.