Viking, well the one Manewolf has in his post is fully automatic pistol.
But, yeah, they took a clone of the G3 in semi-auto only and ripped the stock off and shortened the barrel. That way it fits the legal definition of a handgun and every Walter Mitty's definition of a cool gun.
Actually, it's not fully automatic, it's semiauto for that $949 price. Vector said it has Da Switch because it's sear-ready, so if you later want to buy a registered full-auto sear, you can drop it in.