However, CSBA could've (with the blessing of the law) hit every store in Canada that carried imitation firearms (airsoft or not), and completely stopped legal importation all together. They haven't. QUOTE]
The CSBA does not have the authority to enforce ANY law or regulation beyond that relating to import and export. If anything, the RCMP would have to raid retailers violating any other law.
The CSBA could stop the importation of imitation firearms, but cant do anything about it once it crosses the border and is in the hands of the citizen.