33-barrelled organ

This model of a machine gun consists of 33 small guns lined up in elevens, mounted on a single revolving framework. Once the first row of ammunition has been fired, the gunner can set up the second and the third rows one after the other. The muzzle-loading guns are hinged to the framework in order that they can swing upwards for loading. Once loaded, the barrels are held in position by a metal bar fitted via wooden pins.
Codex Atlanticus, sheet 157