How to non restricted sales in QC between individuals

[Kobs]

First time seller

I just sold a rifle (NR) that was registered (according to the QC laws)
Is there anything i have to do once it's sold to"un-register it" off of my name?
Or the fact that some other QC resident has it is enough, since he will have to register it as well.

I had to ask cause what if i sold it to a non QC resident that does not have to go trough this BS

Thanks