Actually, quite the opposite of a noisy muzzle brake.

It looks like what you might call it a "silencer". Although it is naturally not totally silent, as this would require subsonic loads.

This one is special however due to it being modular. In other words, besides the base part, you can add up to 6 modules which add an extra 2cm each. The more you add the more noise reduction. But this also makes it longer and heavier. So the optimal thing for my use is to use only 1 or 2 modules while hunting, and use all 6 when having fun at the range.

http://www.a-tec.no/lyddempere.html

The one pictured is not the modular one I’m talking about, but a standard telescopic one. In other words, half of it slides back onto the barrel, making it usable only for barrels without front sights. The front mounted modular one I am going to use is unfortunately not pictured on his website yet.

Erik