It is the KelTek KSG.
It is real, but good luck finding one.
The KSG weighs 6.9 lbs. and is as compact as legally possible with a 26.1” overall length and an 18.5” cylinder bore barrel. Even with this compact size, the internal dual tube magazines hold an impressive 12 rounds of 12 gauge 3” rounds in total (6 per tube). It can also reliably shoot shells as short as 1 3/4” up to the 3”
