- "Take that, you mutated son of a bitch!"
- —Otis Peabody after shooting at Marty McFly with a double-barrel, mistaking a radiation-suited Marty McFly for an alien
- "If you can't read the sign, Tannen, I assume you can read this."
- —Marshall Strickland, threatening Buford Tannen with a double-barreled shotgun
A double-barreled shotgun was, as the name suggests, a shotgun with twin barrels instead of a single; this gave it better firing capability, but it had limited range and only two shots before reloading was required. It was a common weapon in America, usually for home defense as demonstrated (somewhat poorly) by Otis Peabody. Marshall James Strickland carried one in 1885, which he used to threaten Buford "Mad Dog" Tannen on several occasions; his son carried a sawn-off version, which offered greater firepower at reduced range.
Otis Peabody kept a double-barreled shotgun on his family farm as a means of defending his home from threats. One of these threats (a crashed alien spaceship and a yellow-suited occupant) was actually Marty McFly in the DeLorean time machine, who had managed to travel back in time to 1955. Thinking they were under attack, Otis grabbed his shotgun and fired at the 'invader', missing each time and destroying several objects, including his own mailbox. It was also used by Marshall James Strickland in 1885, where he threatened Buford Tannen after he refused to hand over his weapons. After Tannen complied, he put the gun down and lectured his son on discipline. The Marshall was later shot in the back by Tannen after getting his weapon shot out of his hands; though his son attempted to threaten Tannen with a sawn-off double-barrel, he relented after the outlaw killed his father.