As quickly as gun-grabbing governors snatched away citizens’ Second Amendment rights, gun owners are filing lawsuits to get them back.

Individuals, retailers, gun-rights groups and manufacturers joined together in Connecticut and Colorado this week to take the 2013 gun-control laws to court.

On Wednesday, plaintiffs filed suit in U.S. District Court in Connecticut challenging the constitutionality of Gov. Dannel Malloy’s dramatically-titled “Act Concerning Gun Violence Prevention and Children’s Safety.” The National Rifle Association (NRA) is one of the plaintiffs.

The Democratic governor signed the law on April 4 after using “emergency” procedures to rush it through the legislature, just four months after the Newtown shooting. Scott Wilson, the president of the Connecticut Citizens Defense League, one of the plaintiffs, told me in an interview Thursday that the law puts people in more danger.

“They are trying to legislate utopia. They think passing a law and putting up these magical ‘gun-free zones’ will work,” Mr. Wilson said. “But it’s just an invitation for a killer to come in because there will be no resistance.”

The parts of the law that went into effect immediately include government background checks for private gun transfers and bans on an additional 100 firearms models deemed “assault weapons” for having certain cosmetic features and ammunition magazines that can hold more than 10 rounds.