"Just a small mod to be used with Medieval Times, or other mods that adds in factions.
The mod itself just disables any faction who use guns to spawn on your world map. This mod does not stop the player from getting guns, players themselves can chose to use guns or not."
Link to Medieval Times (I DID NOT MAKE THIS ONE)
http://steamcommunity.com/sharedfiles/filedetails/?id=732569232
(v. 1.0) Removes factions with Guns.