Hi Luigi and welcome. Any States with a possible capacity limitation is listed here (under Shotguns): budsgunshop.com/state_restrictions.php --------------------- Cheers and stay safe!

Its Illegal in states that have a limit of less than 10 rounds for a shotgun as well as states that ban detachable magazines for shotguns If you ask about a specific state we can give you a better answer

Maybe ask, if it's legal in YOUR state??

Hi Luigi, any state in which you cannot use a 10rd magazine that would fit into a semi-automatic shotgun.
New Jersey is the first one that comes to mind.