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Pancor Jackhammer


Automatic Shotgun (1987)


Infantry Small Arms / The Warfighter

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At least three working Pancor Jackhammer shotgun prototypes were known to exist yet the system failed to find any takers.



Authored By: Staff Writer | Last Edited: 05/12/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
The Pancor Jackhammer was developed by American gunsmith John Andersen as an automatic repeat-fire shotgun. The design was patented in 1987 with development work under the Pancor Industries brand label of New Mexico. The Jackhammer intended to combine the hard-hitting lethality of the 12-gauage shell with the repeat-fire nature of an automatic weapon, utilizing a revolver-style approach. The end product became a large - if cumbersome - futuristic-looking weapon that never found any takers on the world stage. Pancor Industries went into bankruptcy and all company assets - including the Jackhammer prototypes and plans - were sold off. The Jackhammer Mark 3 was the last known derivative of the Jackhammer design and it is estimated that no more than three were ever completed. For a time, the Jackhammer was being evaluated by the United States military which prevented its sale to foreign parties and, thusly, this added to the weapon's demise.

At its core, the Jackhammer was a conventional gas-operated system which allowed for full-automatic fire from a revolving 10-round ammo-cassette feeding 12-gauge (2.75") shells in through the rear of the receiver. The weapon sported conventional iron sites and two integral loops to serve as carrying handles across the top of the receiver. The barrel featured a distinctly angled muzzle cap with the angled pistol grip integrated into the underside of the weapon body. The Jackhammer weighed 4.57 kilograms with an overall length of 787mm and barrel length of 525mm. The firing action was semi-automatic or full-automatic through a selector switch. Rate-of-fire was listed at an impressive 240 rounds per minute. Due it its high rate-of-fire, the National Firearms Act of 1934 in the United States categorized the Jackhammer as a "machine gun" due to its high quantity repeat-fire capabilities, subsequently resulting in heavy regulation.

Specifications



Service Year
1987

Origin
United States national flag graphic
United States

Classification


Automatic Shotgun


Pancor Corporation - USA
National flag of the United States United States
(OPERATORS list includes past, present, and future operators when applicable)
Close Support
Extreme close quarters use; trench-clearing; doorbuster; security.


Overall Length
787 mm
30.98 in
Barrel Length
525 mm
20.67 in
Empty Wgt
10.08 lb
4.57 kg
Sights


Integrated (Carrying Handle).


Action


Gas-Operated; Full-Automatic

Full-Automatic
Rounds are automatically ejected from the breech, a new cartridge stripped from the feed and set in the chamber, and rounds are continuously fired so long as the trigger is pulled and an ammunition supply exists.
Gas-Operated
Gas-operated system is featured, typically involving a gas cylinder and rear-driven piston directing energy to the bolt component.
(Material presented above is for historical and entertainment value and should not be construed as usable for hardware restoration, maintenance, or general operation - always consult official manufacturer sources for such information)


Caliber(s)*


12-Gauge

Sample Visuals**


Graphical image of a 12-gauge shotgun shell
Rounds / Feed


10-Round Cassette
Cartridge relative size chart
*May not represent an exhuastive list; calibers are model-specific dependent, always consult official manufacturer sources.
**Graphics not to actual size; not all cartridges may be represented visually; graphics intended for general reference only.
Rate-of-Fire
240
rds/min


Jackhammer - Base Series Designation
Jackhammer Mark 1 - Presumed original prototype
Jackhammer Mark 2 - Presumed second prototype
Jackhammer Mark 3 - Presumed third prototype; last known version.


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