In country laws are very relaxed, nothing bars a person from owning an airsoft gun.
The only issue is importation, a person cannot import their own airsoft gun because the Canadian border service agency has deemed airsoft an replica firearm. The caveat to this is that airsoft guns that are either all clear or have their respective restricted receiver parts clear will be allowed. Sourcing such guns outside of Canada can be difficult because the majority of the stock is located in Canada. Respectively due to the nature of airsoft in Canada, the existing non clear guns will carry a higher price.
There are a few places to shop in Vancouver, but I will let the locals in that area handle that.
They have a large community there so you should be well taken care of.
"Its only a little bit on fire"