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.
Firearm (tool)
The most common type of flare gun is a Very pistol (which can also be spelled Verey pistol), which was named after Edward Wilson Very (1847–1910), an American naval officer who developed and popularized a single-shot breech-loading snub-nosed pistol that fired flares. Modern varieties are frequently made out of brightly colored, durable plastic.