RobertTheBruce
King
Of course, this is only possible if the barbs can research with their own beakers (I assume they can. Can anyone confirm?), as otherwise they won't get Rifling
Barbarian research is a bit different than the other AIs. They will discover techs after another civ discovers it. I'm not sure of the number of beakers per turn per civ with knowledge of the tech. There was a SGOTM with the barbarians as allies where this was used to research some techs. So its possible to beeline rifling or civil service, choke the AIs and wait for barbarian rifles vs longbows or more likely maces vs archers. It won't be a quick victory but its probably possible.