From Ammoland:

The case, Shew v. Malloy, was initiated on May 22, 2013, when lawyers on behalf of June Shew and several other plaintiffs filed a complaint in the United States District Court for the District of Connecticut. The complaint alleged several violations of the plaintiffs’ rights.

The complaint first claimed that the state’s bans on magazines and certain semi-automatic firearms are in violation of the right to “keep and bear arms as guaranteed by the Second Amendment of the United States Constitution, and as made applicable to the States by the Fourteenth Amendment.” Next, the complaint argued that the firearm and magazine prohibitions violate the plaintiffs’ right to equal protection under the law, as several classes of government employees are exempt from the ban. Last, the complaint asserted that portions of the Act violate due process, as the ban is vague.