No, one cannot buy or bear arms in any way resembling most US states. In order to (legally) own such a weapon one has to be member of some sort of gun club and practise shooting there. Or apply for a special gun collector’s permit. But as to what kind of weapons that lets you own I am unsure. Lots of red tape.

But to carry such a weapon in public is still not possible (again, legally). And actually shooting anyone, no matter how good the intention, such as a burglar, will never hold up in court.
Sweden is a bit like Canada I guess. There are lots of guns in circulation, probably more than the US devided per capita, but mostly for game hunting. Assault weapons, revolvers and pistols are scarce.

Here’s some good ones http://www.colt.com/CMCI/pi...

They’re much more effective than sticks. With a stick you have to close. With a gun you can back away.