Can You Keep a Gun in Your Car in Canada? (Laws And Advice)
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You are allowed to keep a gun in your car if it is a non-restricted firearm and you have valid permission to do so. This permission is typically in the form of a firearms license, which you can obtain by taking a firearms safety course and passing a background check. Even with a license, there are still some restrictions on where you can take your gun and how you must transport it.
More: https://car-glass.ca/blog/can-you-keep-a-gun-in-your-car-in-canada/