For a regular Joe, even with the "right velocities", your gun is likely to be seized, which then turns into an appeal where the gun has to be tested by the RCMP (at your cost), making the process take months and cost more than just buying in Canada. Even some of the larger legal retailers with all the right importation paperwork and such get grief from CBSA. It can be done, but the headaches, costs and long waits associated with the process outweigh any benefit from doing so, considering the great selection of guns we currently have available in Canada.
Get age-verified and you'll see. If you're not 18, then you shouldn't be looking into buying airsoft guns anyway.