I don't see how this will work well.
If I buy a gun from someone in Quebec my information will not be recorded.
As well if I sell a gun to someone in quebec I am not obligated to notify anyone. The person buying the gun will have to decide to register their firearm.
I think I read a stastic that said when the national firearm registry was impliment they estimated 7 million firearms were legally owned in Canada and around 3 million firearms were registered.
Hats off to Quebec for making the effort, even if they are stuck bordering two of the jurisdictions who did almost everything in the power to stymie the original implementation of the national registry. As for the selfish actions of those who celebrate the death of the national registry, I hope the next time there is another murder of a woman by firearm in a "domestic dispute", a Polytechnique, or Mayerthorpe, or Moncton style shooting they come forward to demonstrate how that could never, ever have been averted by police being able to ascertain who has access to what weapon....
I don't see many ways in which a registry would prevent shootings. One way I guess would be if someone did something that caused them to have their firearms licence taken away the police could look at the registry, assuming the person registered all their firearms, and would know how many weapons and what type the person had.