3 barrels, 18 1/2 inches ?
There are better alternatives,they're called a pump or a semi auto .
Even the 3 barrel design isn't new, the German Drilling is not only 150 years older, but by adding a rifle barrel instead of a 3rd shotgun barrel it is more versatile.
Use the words "new and improved" or "tactical" and you can get suckers to buy anything.