The origional design had a baffle, although by modern standards it's not a suppressor.
The law in Canada is somewhat phucked. If the device lowers the report of a firearm, it's prohibited. The question however is what precisely does that mean? Without a standard test approved, some flash hiders and muzzle breaks could be found to be silencers when clearly they don't do anything but change direction.
(ie, a microphone placed 10 feet to the right of the muzzle, vs 10 feet to the right and 10 feet back, vs 10 feet to the right and 10 feet forward)