The UAC's Riot Shotgun: Replaces the Super Shotgun slot. Just drag and drop it with your choice of ZDoom port and a Doom/Doom II/Final Doom wad.
In this version, I used DECORATE in order for it to be compatible with older GZDoom ports for those who are wondering what's the difference between the Realm667 version and this.
Some useless backstory: The UAC, impressed by the efforts of DoomGuy's Earth-saving measures, gifts our bad-ass hero the Riot Shotgun, a suitable replacement for the Super Shotgun. More powerful and with a faster firing rate than the standard Shotgun, once you get this baby, you will most likely never use the other Shotgun again.
*Riot Shotgun skin and sounds taken from Realm667.com
I like it! It shoots fast!
A better weapon overall compared to the Super Shotgun.