As set out in Criminal Code Regulations, some large-capacity magazines are prohibited regardless of the class of firearm to which the magazines are attached. As a general rule, the maximum magazine capacity is:

  • 5 cartridges for most magazines designed for a semi-automatic centre-fire long gun; or
  • 10 cartridges for most handgun magazines

A large-capacity magazine is not prohibited if it has been permanently altered so that it cannot hold more than the number of cartridges allowed by law. Acceptable ways to alter a magazine are set out in the regulations.

There is no limit to the magazine capacity for semi-automatic rim-fire long guns, or for other long guns that are not semi-automatics, with some exceptions. See also Special Bulletin for Businesses No. 72Maximum Permitted Magazine Capacity.