Shotgun

From Memory Alpha, the free Star Trek reference.

A shotgun is a projectile weapon, based on technology dating back to Earth's 19th century.

A holodeck program of the Ancient West, created by Alexander Rozhenko and Reginald Barclay, featured a bandito character who was armed with a shotgun. (TNG: "A Fistful of Datas")

In 1996, two militia members in Arizona, armed with shotguns, captured Chakotay and B'Elanna Torres after their shuttlecraft crash-landed nearby. The two, named Portar and Butch, then employed the shotguns while attempting to defend the prisoners and the captured ship from law enforcement. (VOY: "Future's End, Part II")

In the 2020s, San Francisco police were armed with advanced shotguns, which they carried with them as they patroled the Sanctuary Districts. During the Bell Riots of 2024, the residents who held the government personnel hostage used acquired police shotguns to ensure their cooperation. (DS9: "Past Tense, Part I", "Past Tense, Part I")

In 2063 in the mirror universe, Zefram Cochrane used a shotgun to kill the first Vulcan who set foot on the planet Earth. The crowd who had gathered to witness the arrival of the Vulcans to Earth also used shotguns to shoot the other occupants of the Vulcan starship.

In 2155, Captain Jonathan Archer, commanding officer of the ISS Enterprise (NX-01), owned Cochrane's shotgun. He showed it to his Vulcan Science officer, T'Pol, in an attempt to illustrate the fact that her people were under Human oppression, and that T'Pol was under Archer's command. (ENT: "In a Mirror, Darkly")

The name of this weapon was not mentioned in the final episode of "In a Mirror, Darkly", but is taken from the episode's script.