I would doubt they would make it into the US in that configuration, unless you somehow purchase it and fill out the paperwork for it as a NFA item. To import them in any viable quantity it would need a longer barrel, and would probably have to comply with 922r, as it is definitely considered a "non-sporting" shotgun.
Doing so would probably defeat its intended purpose of having a lot of firepower in a compact package. Here's a link with some info:
Modern Firearms - Shotgun MAG-7
Doing so would probably defeat its intended purpose of having a lot of firepower in a compact package. Here's a link with some info:
Modern Firearms - Shotgun MAG-7