As for what mcguyver got
From the CFC Fact Sheet for Airguns:
Such air guns are exempt from licensing, registration, and other requirements under the Firearms Act, and from penalties set out in the Criminal Code for possessing a firearm without a valid licence or registration certificate. However, they are considered to be firearms under the Criminal Code if they are used to commit a crime. Anyone who uses such an air gun to commit a crime faces the same penalties as someone who uses a regular firearm.
The simple possession, acquisition and use of these air guns for lawful purposes is regulated more by provincial and municipal laws and by-laws than by federal law. For example, some provinces may have set a minimum age for acquiring such an air gun. For more information, please contact your local or provincial authorities.
Just because you need to be 18 and over to buy an airsoft, it doesn't say in the sheet you need to be a certain age to possess one. Why are you guys trying to make your own rule saying you can't.
IMO, I think the reason why they didn't put the age down is because they would probably have to go through each and every province?