How did they know to send you a letter if it wasn’t already registered? Did everyone with a license get said letter?
Way back in the 90’s after the Polytechnique the first step was the Feds drew up a list of semi autos and passed legislation ( C-17?) requiring owners to register only. That was Kim Campbell I believe. No change in status they simply registered them.
Then a few years later Jean Chrétien and Allan Rock got into power and low and behold what same list was now used to designate the very same, registered rifles as Restricted Class? Of course they knew how many and where they were now.
Fast forward to 2020 and here we are.