While searching about O/U double barrel rifles, I stumbled upon this unusual (old) Brno Super 9,3x74R. Please take a look at the muzzle of barrel set:



From what I could see, this barrels could be regulated. First time I had seen that on this gun. Any Brno Super I had chance to see or handle didn't have noted feature.

Is that something done on very late production of this particular model, or it's a custom work created by skilled gunsmith?

Thanks

I have two Brno"s,a stopper & a super like your's,my super is a 375 H&H,it does not have the ring around the two barrels,I have seen seen this arrangement on some guns,usually it's adjustable regulation,but I could be wrong,I used to live in Mississauga btw.

shotguns are done like that but you can only adjust one [the bottom] barrel.
anyhow they use different 'hangers' basically just a piece of figure-8 metal with thicker and thinner pieces between the two 0's.