The brief argues that Rhode Island’s large-capacity magazine law is a constitutionally permissible restriction, as the Second Amendment of the U.S. Constitution does not prevent states from enacting common-sense gun regulations and because Rhode Island’s law is consistent with a historical legal tradition of regulating and imposing restrictions on new and distinctively dangerous forms of weaponry.
The the Attorneys General of California, Colorado, Connecticut, Delaware, the District of Columbia, Hawai‘i, Illinois, Maryland, Michigan, Minnesota, New Jersey, New York, Oregon, Pennsylvania, Vermont, Washington and Wisconsin joined with Campbell in the brief.
Surprised to see PA and VT in that list...
oh, and -