Guns are common enough in Canada. But not nearly as ubiquitous as in the USA. Also the type of firearms are quite different.
As far as I know, fully automatic hand guns are impossible for individuals to own. Also assault rifles, grenade launchers and other items that appear to be available in various jurisdictions in the USA.
To get the license to purchase a revolver or semiautomatic handgun in Canada requires a fairly thorough criminal record check, and provision of 2 references (who are themselves both given criminal records checks and grilled as to the suitability of the candidate to own restricted firearms). The only justification for owning one is sport shooting. (Personal self defense is NOT a valid reason to purchase ANY firearm.) The RCMP then keep a national database entry on both the owner and the weapon.
Unlicensed and illegal firearms do exist, but their ownership is a crime and leads to an automatic prison sentence when found out.
Most firearms are long guns (rifles) used in either sport shooting or hunting (which itself requires a license, unless one is aboriginal and has a subsistence hunting exemption).
A HUGE difference between this and the mess in the USA. Explaining nicely the lack of periodic mass shootings in Canada.