Shotgun
Memory Beta, the wiki for licensed Star Trek content.
A shotgun was a sort of gas pressure weapon using either multiple small bits of metal or a single, large slug as a projectile. These weapons were also used for sport. This was deadly at a short range, an often an irritant at a distance.
In 2268, the Melkotian recreation of John Holliday used a shotgun. (TOS episode: "Spectre of the Gun", TOS novelization: The Last Gunfight)
