關於an overview of combat shotgun models in various games，參見combat shotgun。
The Heckler & Koch CAWS (H&K CAWS) 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 in to the U.S military's Close Assault Weapon System program.
Outside of the Fallout universe, the H&K CAWS was a recoil-operated, bullpup-configuration shotgun prototype designed to fire high-impulse shotshells using tungsten buckshot or flechettes with an effective range of 100–150 meters and a 10-round box magazine. It had a fire selector switch similar to the G11, with a full-automatic firing rate of approx. 240 rounds per minute. It never reached production due to the cancellation of the CAWS project by the US.