Importing or exporting firearms, weapons or devices into or from Canada
Any firearm, weapon or device that is imported into or exported from Canada must be declared. If the goods are not declared, the Canada Border Services Agency will confiscate them and criminal charges could be laid.
If you are importing or exporting firearms, weapons or devices into or from Canada for commercial reasons, you must have a valid Business and/or Carrier License and a valid Import or Export Permit from the International Trade Canada (ITCan). You can contact the ITCan Export Controls Division at 613-996-2387, or by fax at 613-996-9933.
Before you try to import a firearm, weapon or device, please check carefully to make sure it's not prohibited. It is a criminal offence for any person to possess a prohibited weapon unless he or she is authorized to do so by law. Examples of prohibited firearms are fully automatic firearms (even if they have been altered to not fire automatically) and sawed-off rifles or shotguns where the barrel is shorter than 457 millimeters or 18 inches, and the overall length is less than 660 millimeters or 26 inches. Silencers that muffle the sound of a gun, knives that open automatically, pepper spray, throwing stars, spiked wristbands, blowguns, brass knuckles, and stun guns are examples of prohibited weapons.
As a commercial importer you are responsible for the safe transportation and storage of the firearms under your control. Please refer to the Storage, Display and Transportation of Firearms and Other Weapons by Businesses Regulations of the Firearms Act.
http://www.cbsa-asfc.gc.ca/eservices/bis/bis61-e.html