Well, I was surprised to find out some years ago that silencers were both legal and increasingly popular here in Norway. Reasons given on a hunting blog: Less noise when hunting early mornings, late evenings; less noise when hunting close to houses and farms; protect hunters' hearing (and dogs!); less noise and recoil so you can see how well you shot; less noise and recoil so you shoot more precisely; no flame from the barrel so you aren't blinded when shooting early morning/late evening. Also, the way hunting is organized in Norway, your license may only be for a fairly limited area, silencers will keep you from scaring animals off your "ground".
Sample silencer ad here Sorry it's all in Norwegian.
Oh and semiautomatic rifles are limited to 3 or 4 bullets when hunting.
Norway has very strict gun control laws but Norwegians have a lot of guns and shooting, target or hunting, is extremely popular and widespread.