(NOT A REAL GUN JUST MY SOLUTION FOR A PROBLEM WITH CHARACTERS, HOPEFULLY SCREENNAMELESS ALLOWS THEM)
Designed by Torvaan for Va'asch purely because of the fact the Gnasher Shotgun frustrated Va'asch so much. The main reason was the fact it's effective range was about as far as you and I can throw a bowling ball! Bowling balls aside, Torvaan got to work on a weapon, with better hitting power than the Gnasher, but at the same time, more range.
What he came up with was ridiculous and yet awesome at the same time. He took 4 single Gnasher barrels and mounted them on an over-sized revolver system (including a pistol grip, and a hand hold further up). Then, taking a page from the Boltok book, gave it a quick loading system to load all four barrels at once. The weapon was ineffective for melee purposes, which might break the firing and revolving mechanism if your unlucky. Which wasn't all bad for Va'asch who simply dealt with close-by enemies with spiked-knuckled gloves.
The product was an, efficient, LONGER ranged shotgun which held less ammo, but reloaded faster. Va'asch's own was the only one ever constructed.