Just so there's absolutely no question about this, here is the Canada Border Services Agency
saying that airsoft cannot be simply imported into Canada.
And here's a Canadian criminal court case
in which a Canadian airsoft retailer was found guilty of importing and selling airsoft guns.
In the end, EastCoastAirsoft is just another greedy, opportunistic American business trying to make a quick buck off Canadians who don't know Canadian law.
Or maybe ECA believes that Canadian retailers are bribing Canada customs and the judicial system.