Volley gun
The Ribauldequin was a medieval version of the volley gun. It had its barrels set up in parallel. This early version was first employed during the Hundred Years' War by the army of Edward III of England, in 1339. Later on, the late Swiss army employed it.
Automatic revolver
An automatic revolver was communicated to Moses Poole, a patent agent, in 1841. The identity of the inventor of this weapon is unknown. Another automatic revolver was communicated to British patent agent William Edward Newton by the Americans Mershon and Hollingsworth in 1854. Both of these weapons used clockwork as the power for achieving automatic operation. The Webley-Fosbery Automatic Revolver was designed in 1895 and would go on to become the first commercial and best known automatic revolver.