The very first ones were made with bamboo.
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Later barrels were cast of brass and bronze. Iron barrels were made by heating and twisting strips of iron or steel, reheating, twisting around a rod, reheating, and hammer welding.
The first were made from bamboo, which is a type of grass.
SteelSteel
Dozens of countries
The original Gatling gun had six to ten barrels which rotated and fired independently. This was one of the earliest machine guns made.
The first ones had six barrels that used .58-caliber ammunition.
Machine guns, as we think of them today, were invented by Hiram Maxim. There were earlier battery guns (many barrels firing at once) but the Maxim machine gun was the first to use the energy of a fired cartridge to operate the gun.
No. Cast iron is brittle, and shatters like glass.
Gatling gun
Made by a machine. Machines never make the same thing EXACLTY the same.
Exactly how is the gun marked so we can identify what you actually have. sales@countrygunsmith.net
Depends on the maker. Some gun barrels are the finest quality type 4140 chrome moly or 416 stainless steel with button rifling. Hi-Point pistol frames are made from a high-impact polymer and barrels are from an alloy stainless steel.
The barrels will usually be made of steel. The remainder of the gun.. depends on which gun you had in mind. The receivers may be made of steel, they may be made of aluminum, they may even be made of polymer.