That O/U BRNO is a terrific gun. Light and quick pointing. Mine has double triggers that work similar to the Superposed double single trigger. If I recall correctly, the front trigger fires the upper barrel. I bet you cannot figure out how to disassemble to clean it though. Hint: the fore arm does not come off, it stays with the barrels. BTW, the standing breech is moveable in and out when the gun is open, sorta like it is spring loaded.

So many guns, so little time!