According to the cbsa if an airsoft gun shoots above 407 fps on .22s its not considered a replica and should be allowed into the country, whats going to happen is it will be taken for testing and eventually returned to you. This could be a week or 6 months or a year later. But if one shot shoots less than 407 fps it will be destroyed, if it shoots over 500 fps it will be seised as your now importing a firearm without the proper permits.
Your best and easyest solution would be to sell it and get a new gun here.
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