Drew, the French "becassier" models certainly fit the description. Either OU or sxs. I have a Verney-Carron catalog from about 20 years ago showing a 12ga OU with 61cm barrels, weight of 2.5 kg. The "Grand Becassier". Bottom barrel canon raye dispersant, top with choke tubes. They are especially designed for woodcock hunting, but I think they could be called "brush guns". Similar guns also available from Italian makers.