Doesn't strike me as being that confusing. With beehive of gun restrictions/limitations in Canada, why would a manufacturer want to alter a successful (probably good-selling) design to sell who knows how many copies in a market as small as Canada? I doubt the STG would have been altered for the Canadian market if that was what was required to sell it here. I'm not a semi fan, nor do I care a whole lot for tactical/military guns of any kind...but I've always been fascinated with the MP40. I could maybe even be tempted to buy one if they made it here, but our main problem in Canada is our gun laws, and these a-hole Liberals running the show. The RCMP are also busy solving crimes that haven't happened for the greater good~so consider things like the 10/22 mag restrictions a big warm hug from Justin Turdeau.