A 16-inch Gatling gun would become a thousand-ton installation

How much would a 16-inch Gatling gun weigh?

A rough three-barrel installation would probably approach or exceed one thousand tons once its mechanism and turret support were included.

This deliberately rough engineering estimate begins with three 16-inch barrels and breeches weighing several hundred tons. The rotating and loading machinery could add roughly another two hundred tons, while the turret and structure needed to carry and train the weapon would add hundreds more. That brings the complete installation toward or beyond a thousand tons before ammunition handling creates further demands. An apparently simple increase in rate of fire quickly becomes a ship-wide weight and structural problem.