Heckler & Koch HK CAWS

The Heckler & Koch HK CAWS (Close Assault Weapon System) is a prototype automatic shotgun—designed as a combat shotgun—co-produced by Heckler & Koch and Winchester/Olin during the 1980s. It was Heckler & Koch's entry into the U.S military's Close Assault Weapon System program.

Heckler & Koch HK CAWS
The H&K CAWS
TypeBullpup automatic shotgun
Place of originWest Germany
Production history
DesignerHeckler & Koch, Olin Industries (Winchester Group)
ManufacturerHeckler and Koch
Specifications
Mass3.7 kg (8.2 lb) empty with magazine
4.3 kg (9.5 lb) loaded
Length762 mm (30.0 in)
988 mm (38.9 in) (Barrel Extension)
Barrel length457 mm (18.0 in)
685 mm (27.0 in) (Barrel Extension)

CartridgeBelted, straight (18.5×76 mmB)
12 Gauge
ActionSelect-fire Recoil operated with moving barrel and self-regulated gas assist
Rate of fire200–300 rounds/min
Muzzle velocity
  • Tungsten alloy 538 m/s (1,770 ft/s)
  • 000 Buck 488 m/s 488 m/s (1,600 ft/s)
  • Flechette 900 m/s (3,000 ft/s)
Effective firing range150 m (160 yd)
Feed system10-round detachable box magazine
SightsIron sights
Integrated optical sight

It is a 10-round, 12-gauge, bullpup shotgun with two firing modes: semi-auto and full-auto. The gun is fully ambidextrous.

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