From the Canadian Firearms Blog comes eight reasons why Canada isn't all bad on guns. The variances between Canadian and US law are interesting. No special restrictions for short-barreled rifles in Canada. Most Americans don't have to get permits to possess firearms, but we generally have to go thru an FFL to buy one interstate. Canada requires the permit but allows private parties to buy inter-province.
With all those variances, why, a fellow might start to think that the gun regulations of both counties are arbitrary rather than rational.