Judging by the sibling comments here, silencers are a hot button issue on HN. FWIW, silencers are as of this year purchasable without a permit in Sweden (a hunting permit is required which involves firearms training, but before a separate license was required for the silencer)

EDIT: and as several commenters already have pointed out, it's a good thing. Shooting an unsilenced 30-06 rifle in a closed hideout will hurt even with ear protection.