Double-barreled shotgun
A double-barreled shotgun was a type of crude firearm used on Earth.
The Sixth Doctor used such a weapon to kill Chintor, an insectoid scout of the Kyle system, at close range. (PROSE: Retribution)
Bat Masterson carried a double-barreled shotgun with him, which he used to threaten Billy Clanton. (TV: The Gunfighters)
Meg Seeley used a doubled-barreled shotgun to defend herself when an Auton invaded her home looking for a Nestene energy sphere that her husband Sam had taken. However, the weapon proved inaffective against the Auton. (TV: Spearhead from Space)
Garvin fired a double-barreled shotgun at Azal before being killed by the Dæmon. (TV: The Dæmons)
Some of the security guards at the Global Chemicals factory in Llanfairfach carried double-barreled shotguns. (TV: The Green Death)
Phillips threatened the Third Doctor and Sarah Jane Smith with a doubled-barreled shotgun when they found him looting a jewellery store. (TV: Invasion of the Dinosaurs)
The Fourth Doctor and Leela used a doubled-barreled shotgun loaded with rock salt to disable and kill two Fendahleen. (TV: Image of the Fendahl)
Helen Sherman, one of the Brynblaidd cannibals, held Ianto Jones and Toshiko Sato at gunpoint with a double-barreled shotgun. (TV: Countrycide)
Neil also planned to murder his ex-wife and son with a double-barreled shotgun and then kill himself in a fit of revenge on his ex-wife's boyfriend; fortunately, he was knocked out by Toshiko Sato with a golf club before he could do so. (TV: Greeks Bearing Gifts)
The shotgun was also used by some residents of Hooverville to defend themselves against pig slaves, to great success, but the weapons were ineffective against Daleks. (TV : Evolution of the Daleks)
A Roboman used a shotgun to hold the Fifth Doctor and Nyssa on Earth in 2158. (AUDIO: The Mutant Phase)