Everything is in limbo because of Feinstein's legislation. Here is a summary regarding shotguns:
"All semiautomatic shotguns that have a folding, telescoping, or detachable stock; pistol grip; fixed magazine with the capacity to accept more than 5 rounds; ability to accept a detachable magazine; forward grip; grenade launcher or rocket launcher; or shotgun with a revolving cylinder. The legislation excludes the following weapons from the bill: Any weapon that is lawfully possessed at the date of the bill’s enactment"
The H2O has a pistol grip, capacity to accept more than 5 rounds, and a telescoping stock. That would make it a banned weapon. If you already own one you're in the clear but if the bill passes your chances would be zero.