Originally Posted by -Rooster
It came to mind that according to Canadian Laws, an airsoft gun can only be imported if its between 366 and 500 fps. Anything below 366 fps is illegal, to my understanding
That's not quite accurate, the inferior limit is 366 fps with .20g BBs and the upper limit is 500 fps AND 5.7joules, which works out to over 700 fps with .20g BBs. For the majority of airsoft guns, there isn't an "upper limit."