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For everyone saying that this is a solution looking for a problem, I must point out that Saigas and Veprs had no problem getting sold.

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They are also purpose built gas operated semi-autos vs. adding a box mag to a classic pump shotgun.

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And until those gas operated semi-autos are allowed back into the country, I'm sure people will be filling the void with this.

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Frankly, it's a solution to a problem real life, tactical users had. This will potentially revolutionize the police shotgun for specialized use. As an entry gun it would offer vastly superior ballistics to a 556 carbine and barrel length won't restrict capacity like a tube fed gun. In combat situations (adrenaline dump) it will be much easier to reload using gross motor skills, unlike the tube fed gun that takes much training to be competent with. Carrying spare ammo will be easier in loaded mags on web gear. Different ammo ( slugs, Buck shot, bean bags, etc) could be loaded into color coded or tactile marked mags. This would be a big improvement over the way it was done in the past.

Quoted:  The problem I see is that this design still uses the basic shotgun shell, which was not designed to feed from a box magazine.  Keeping any box mag shotgun ready for action for very long (hammer down on an empty chamber) winds up crushing the front of the shotshell, causing it to be oval shaped, and therefore not going into the perfectly round chamber.  But as Jeff Cooper said, companies make things to sell, not to further the craft.