It is illegal to acquire a replica since december 1 1998. An airgun who closely resemble as a real gun IS a replica.
''As an individual, you may keep any replicas that you owned on December 1, 1998. You do not need a licence to possess a replica firearm and it does not have to be registered. However, you cannot acquire, make or import a replica firearm. If you take a replica firearm out of Canada, you cannot bring it back in.''
I sugest you to read this RCMP web site section:
There is also 2 things:
1- There is the Law
2- There is the way the law is applied