Shrouded barrels are legal but you are not going to get away with any form of muzzle brake even on an airgun. Same with mounting night optics. Their reasoning is that you automatically change the character of the gun to that of someone without good intentions seeing you could not possibly have any reason to silence your gun or to shoot at night. Also any form of hunting with airguns (even if you have a hunting license) is prohibited regardless of the caliber of the gun or the power at which it fires. Furthermore any form of pest control using an airgun or any weapon of any kind be it a blowgun, a bow, a crossbow an airgun or a slingshot is illegal. Slingshots are illegal either way not even allowed to have them :p. We are also not allowed to have tazers, mace or batons they are all classified as illegal weapons. I've done some extensive reading on Belgian law the past week it's quite sad really. Anyone want to offer me a job so I can get a greencard :p ??!