You are correct, c3shooter. There were two versions of the Colt Model 1893 Gatling gun chambered for the .30 Government cartridge(30-40 Krag). The standard Colt Model 1893 Gatling gun had a hand crank, the other was the Colt Model 1893 Electric, lacking a hand crank, but instead having an electric motor to fire the weapon, resulting in a rate of fire of 3,000 rounds per minute. It was intended for naval use. Who, today, would have thought 3,000 rounds per minute in 1893 was possible?