Quoted By:
This is the actual shotgun which was digitized and used for Duke Nukem 3D, sometimes incorrectly identified as a Mossberg 590 Cruiser, it is in fact a Winchester 1300 Defender with a factory pistolgrip. The shotgun belongs to George Broussard, and he bought it used at a gunshow, it had previously belonged to the Texas Department Of Corrections.
Initially the shotgun was just digitized as is, though apparently when showing one of the demo builds to journalists, it was criticized as looking dull, and like "a grey banana," a criticism which was apparently taken to heart. What was done next was to get some parts to put on the gun, a Tac-Star ventilated heatshield to go over the barrel, and then a Tac-Star vertical foregrip for the pump-slide. The shotgun was then digitized again, in better lighting, and then retouched somewhat in post to accentuate the shading, and to add the Duke Nukem radiation emblem on the side of the receiver.
The Winchester 1200 and 1300 shotguns are pretty cool actually, unlike a lot of other shotguns which use a tilting locking block on the bolt to lock into the top of the receiver or an extension of the barrel protruding into the receiver, the 1300 emulates the AR15, using a steel collar extension on the barrel, and a rotating bolt with radial locking lugs to engage into the collar's locking recesses. This allows the shotgun to use a receiver made out of aluminum, and allows it to be pretty impressively lightweight, which would increase recoil a little, but it also makes it easier to carry around.
Duke Nukem has a pretty cool taste in shotguns.