Pancor Jackhammer

The Jackhammer is a bullpup automatic shotgun which never entered production, using a revolver-style drum magazine with a rotating action similar to the British Webley-Fosbery revolver. It is often seen in videogames as a "super shotgun;" the Jackhammer's popularity is due, in large part, to the futuristic look of the weapon. It is often mistakenly described as the only fully automatic shotgun in existence.

There is a slight anachronism in featuring the Jackhammer in any context, as the weapon never made it past prototype stage; some sources state that only two prototypes have ever even been made.

As an interesting aside, the weapon's magazine could be removed and turned into an anti-personnel mine by attaching a detonator that would, when tripped, fire all of the cartridges simultaneously.

The Pancor Jackhammer can be seen in the following video games and films:

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Pancor Jackhammer, 12 Gauge