Section 84 (1) Canadian Criminal Code
automatic firearm means a firearm that is capable of, or assembled or designed and manufactured with the capability of, discharging projectiles in rapid succession during one pressure of the trigger.
It seems pretty clear that if a firearm is capable of firing more than one round with a trigger press it is prohibited. Projectiles means more than one projectile. In this case; two with one trigger press....
prohibited device means
(a) any component or part of a weapon, or any accessory for use with a weapon, that is prescribed to be a prohibited device,
I'm certain this has come up in the past along with aftermarket bullpup stock threads.... It's a prohibited device in Canada.
These trigger have been around for at least 5 years and I'm sure if they were allowed in Canada they would have been available here by now.