Firearms below 366fps are not allowed into Canada. Only those between 366 and 499 are allowed and without a PAL. Also silencers, moderators or suppressors. If you are ordering a pistol above 500fps you need an RPAL. If you are ordering a rifle 500FPS and above you need a PAL.
If you are ordering a pistol 500fps and over you need an RPAL. This will also have to be registered and transfered to the RCMP. This can take a few extra weeks