This is a perfect example of why even in a country like Sweden, restrictive gun laws do not stop criminals from possessing illegal weapons or using them to commit a crime.
Here is a link to Swedish gun laws.
Taking away our Second Amendment rights is not the answer to controlling gun crimes, not when 99.99 % of all gun owners are law-abiding citizens. The only reason to take away our ability to defend ourselves is to allow a tyrannical government to take over. And that is precisely what the left wants.