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.
Volley gun
A number of designs of electronically fired explosive-propulsion projectile weapons and non-explosive projectile weapons were developed by Metal Storm Limited which had some similarities to 18th-century volley guns, particularly in that they use many barrels which can be fired all at once or in sequence such as the Nordenfelt gun. These designs met with little commercial interest and Metal Storm Limited entered administration in 2012.