A gun is a device that propels a projectile using pressure or explosive force. The projectiles are typically solid, but can also be pressurized liquid, or gas. Solid projectiles may be free-flying or
SIG Pro semi-automatic pistol
Battleship USS Iowa fires a full broadside from its nine sixteen-inch naval guns
A 'flying-cloud thunderclap-eruptor,' a proto-gun firing thunderclap bombs, from the Huolongjing.
The first firearm (a "proto-gun"), the fire lance, from the Huolongjing.
The hand cannon, also known as the gonne or handgonne, is the first true firearm and the successor of the fire lance. It is the oldest type of small arms, as well as the most mechanically simple form
Gun
…potential in propellant effect. The metal barrel fire lances began to be used without the lance and became guns by the late 13th century. Guns such as the hand cannon were being used in the Yuan dynasty by the 1280s. Surviving cannons such as the Heilongjiang hand cannon and the Xanadu Gun have been found dating to…
Bronze cannon with inscription dated the 3rd year of the Zhiyuan era (1332) of the Yuan Dynasty (1271–1368); discovered in Beijing in 1935.
Yuan dynasty bronze hand cannon, 1351
Ming dynasty hand cannon, 1409