Made by a machine. Machines never make the same thing EXACLTY the same.
Short barrels, easy to handle in close quarters. Two barrels, 2 shots fast.
Gatling gun
it depends on the manufacturer and the condition of the gun. it helps to know the caliber of all three barrels. usually you have two shotgun barrels and the third is a rifle.
The original Gatling gun had six to ten barrels which rotated and fired independently. This was one of the earliest machine guns made.
The 940 was a single shot shotgun. Sounds like it comes with 2 extra barrels. Values range from 50-100 for a complete gun. With the other two barrels, depending on condtion, you would be in the 75-175 range.
Dozens of countries
Part of the sight.
Technically, there is no limit.
SteelSteel
Interior or exterior?
Any Spyder threaded barrels.
Value is very much effected by condition but assuming the gun is in very good or better condition it should bring about $2000 ($1500 for gun and $5-750 for extra barrels).