Oh, you don't get a hard punishment for the mere possession of an illegal gun here - often just 6 months, of which you usually serve 4.
Though he's otherwise a law-abiding person, so you can never know. An example of just how twisted Swedish "justice" is:
A very well known neo-Nazi, in the same county as Odeon and I live, btw, did 4 months for illegal possession. He was punished several times before. An unpunished person, who forgot to renew his license for his
legal weapons (must be done every 5th year in this Soviet state) got one year (which will be 8 months, if he behaves)!