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H&K P11
Heckler & Koch P11
Country of origin

Germany

Manufacturer(s)

Heckler & Koch

Year(s) designed

1970-75

Production began

1976

Production ended

Present

Weapon type

Underwater Pistol

Caliber

100mm (3.9in) rocket-fueled dart

Action

Electronic actuated

Overall length

200mm (7.9in)

Barrel length

200mm (7.9in)

Weight

1,200g (42oz)

Magazine/Cylinder capacity

5 rounds (Muzzle loaded)

Maximum effective range

30m (98ft) - Air
15m (49ft) - Water

Used by

Denmark
France
Germany
Israel
Italy
Netherlands
Norway
United Kingdom
United States

The P11 is an attempt by Heckler & Koch to manufacture an underwater pistol. Rather than firing a conventional bullet, the weapon fires a steel dart from one of five barrels.

Design DetailsEdit

The P11 is manufactured with five barrels, each loaded with one dart. This design is commonly referred to as a pepper-box design, but the method in which it is loaded remains unknown to most users. This required the barrel unit to be sent back to Heckler & Koch each time it needs to be reloaded.

The P11 is fitted with an electronic firing system, designed to ignite the rocket-fuel-powered dart. This system is powered by a battery pack, located in the grip. This system must remain water tight or the P11 would not fire, which is another clue as to why H&K specify that the gun is to be sent back to them to be reloaded.

AmmunitionEdit

The P11 fires a 100mm (3.9in) steel dart. This dart is often referred to as a rocket, due to the fact that it is fueled by rocket fuel with fins reminiscent to those found on a rocket. The use of a dart is designed to be more accurate than a conventional bullet.

UsageEdit

The P11 is used by several nations for their special forces as well as the Navy forces. Notable users of the weapon include Germany (with the German Commando Frogmen), United Kingdom (Special Boat Service) and the United States (U.S. Special Operations). Previously, H&K had been reluctant to acknowledge the existence of the P11, as they had designed the Mk I Underwater Defence Gun in the past.

A similar design of Soviet origin, the SPP-1 Underwater Pistol, is a smaller alternative to the P11. The P11, on the other hand, has five barrels, allowing for more shots to be fired, than with the SPP-1, which has four barrels.

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