the rcmp bounced back and forth we me a few years ago as to what part was the receiver the top half or the bottom. for a while it was the top then the bottom. then I gave up as I could see they would just change the rules of the game as I tried to play.....
Im guessing they would choose the bottom as it would be a lot harder to make
Were you the one trying to make/import a legal version of the ppsh in Canada?