Straight from the horses mouth, from the RCMP website. I decided to email them and ask what they make of it, there's the response from firstname.lastname@example.org
"Thank you for your inquiry.
Attached, for your information, is the Canadian Firearms Program (CFP) fact sheet titled Air Guns, as well as Replica Firearms, also available on the Royal Canadian Mounted Police (RCMP) web site at www.rcmp-grc.gc.ca/cfp-pcaf/fs-fd/index-eng.htm
Please note that there is no to airsoft guns. Airsoft guns firing a projectile at a muzzle velocity of less than 152.4 meters (500 feet) per second or at a muzzle energy below 5.7 joules (4.2 foot pounds) 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.
Airsoft guns are, however, considered to be firearms under the Criminal Code if they are used to commit a crime. Anyone who uses such a paintball gun to commit a crime faces the same penalties as someone who uses a regular firearm.
Additionally, some municipal by-laws prohibit the use of Airsoft guns in certain areas, or without the approval of the Chief Firearms Officer (CFO). It is important to check with the municipal authorities or the CFO of your jurisdiction. You can contact the CFO of your jurisdiction by phoning the RCMP CFP toll-free information line at 1-800-731-4000."