Summarize this article:

Non-Restricted firearms are ordinary rifles, shotguns, or combination guns that are not listed as prohibited (see step below for restricted firearms). The majority of civilian gun-owners in Canada have non-restricted firearms. To get this license, you'll need to take the Canadian Firearms Safety Course (CFSC). People can be licensed to acquire a restricted firearm for target practice, target shooting competitions, or as part of a collection. Individuals must be at least 18 years old to get a restricted firearms license. Individuals under 18 years of age can use restricted firearms if they are under the direct supervision of a licensed adult. To get this license, you'll need to take the Canadian Restricted Firearms Safety Course (CRFSC). Restricted guns include:  Most handguns Semi-automatic centre-fire rifles or shotguns with barrel lengths less than 470 mm (18.5 inches). Rifles or shotguns that can fire when their overall length is reduced by folding or telescoping to less than 660 mm (26 inches) Individuals are only allowed to own prohibited firearms if one was registered in their name when it became prohibited. Otherwise, no license will allow you to shoot with prohibited guns. Prohibited guns include:  Handguns that have a barrel less than 105 mm in length Handguns that are designed to discharge a 25 or 32 calibre cartridge (unless being used for sporting competitions) Firearms that are adapted from a rifle or shotgun, meaning they've been sawed, cut, or altered in any way. Automatic firearms

Summary:
Get a non-restricted firearms license. Get a restricted firearms license if you wish to own a restricted gun. Figure out if the guns you own (or wish to own) are prohibited.