This is an old thread but a shotgun can have one or two barrels. There is the old term "double barreled shotgun", or also a "side by side". There is also an "over/under" which is also a double barreled shotgun but the barrels sit above and below one another as opposed to side by side. Most shotguns for hunting and also law enforcement / military are of the single barrel type. The action, not the barrels, are referred to as "pump", or "semi-auto". Some shotguns can be both pump and semi-auto (SPAS shotguns). Side by side and over under shotguns are expensive to make as it takes a lot of skill to get two barrels affixed together and have them shoot straight. So, it is rather a misleading term to use "shotgun" unless they cable manufacturer is referring to the concept of having a something coming out of a rather larger opening and rather quickly spreading out as that is what shotguns are designed to do.
