This is a response I got from the RCMP regarding a inexpensive new bullpup being imported into the U.S. from China:
Good Morning,
The firearm make Snow Peaks, Model P12 is equipped with a prohibited device know as a Bull Pup Stock. Bull Pup stock are prohibited device in Canada and no individual can possess this type of device.
Hope this help
Regards
Daniel Guay, Supervisor
Doing a search on NFA's website for bullpup brings this up:
Despite popular misconception, "bull pup" rifles are not prohibited in Canada. Aftermarket bull pup stocks designed to reduce the overall length of a rifle are classified as "prohibited devices", and certain bull pup rifles are proscribed as prohibited firearms through Order in Council.
So, who knows what's legal and what's not.