Recommending a good muzzle.
I use the German Muzzle Special Police Model .... it's a bit expensive 260$US from the NET but it's worth it. You have to see it to believe it..... I got one from a dude that make Dog's train gear in my country... our army dog unity use it also.
I don't know in norway but i know a good kennels in sweden that works with PitBulls and also make leather equipment.