We take unconstitutional laws to court
The Right to Keep and Bear Arms is worth defending, in the courts if necessary. When government ignores the law, or when a lawsuit can set an important precedent, we act: as a plaintiff in our own cases, and with amicus briefs in cases across the country.
Our lawsuits
Current case
Filed November 2025
Caucus v. City of Saint Paul
State preemption claim against the City for passing an illegal, preempted gun control ordinance. The Caucus is the plaintiff.
Our lawsuits
Past cases
2025
Caucus v. Walz
State constitutional claim that the Binary Trigger Ban was passed in violation of the Minnesota Constitution’s single-subject clause. The Caucus was the plaintiff.
2021
Worth v. Jacobson
Federal Second Amendment challenge to Minnesota’s ban on carry by law-abiding adults aged 18 to 20. The Caucus was a plaintiff.
2021
Christopher v. Ramsey County
State preemption challenge to the State Fair’s illegal ban on lawful, permitted carry at the Fair and Fairgrounds.
2019
Anoka Technical College
The college banned firearms campus-wide in violation of Minnesota’s preemption statutes. Minnesota State agreed to revise its policies and signs and follow state law.
2015
Ramsey County elections
Ramsey County posted gun ban signs at polling places. In February 2016 the county agreed to revise its policy and training to reflect state law.
Amicus briefs
Defending the Second Amendment nationwide
An amicus curiae brief is filed by a non-party with a strong interest in a case. We file them in federal and state courts across the country because a threat to our rights anywhere can set a precedent that affects gun owners everywhere.
US Supreme Court, September 2026
Johnson v. Jacobson
With the Second Amendment Foundation, the NRA, and others, we urged the Supreme Court to make Minnesota honor out-of-state carry permits. The Court denied review on October 5, 2026.
US Supreme Court, September 2026
Viramontes v. Cook County
With the Colorado State Shooting Association, we tell the AR-15’s real history and argue that its military origins confirm its protection under the Second Amendment.
Supreme Court of Maryland, July 2026
Duvall v. Maryland
With the Second Amendment Foundation, Maryland Shall Issue, the NRA, and others, we urge Maryland’s highest court to hear a challenge to its refusal to honor out-of-state carry permits.
US Supreme Court, May 2026
Adamiak v. United States
With the Second Amendment Foundation, the NRA, and others, we urged the Court to review a Navy veteran’s conviction for possessing cut-up gun parts. The Court denied review on May 18, 2026, and President Trump pardoned him on September 4, 2026.
US Supreme Court, April 2026
Peterson v. United States
With the Second Amendment Foundation, the NRA, the American Suppressor Association, and others, we challenged the NFA’s registration and taxes on suppressors. The Court denied review on April 20, 2026.
US Supreme Court, January 2026
US v. Hemani
With the Second Amendment Foundation and others, we argued that marijuana users do not forfeit their Second Amendment rights. On June 18, 2026, the Court ruled for Mr. Hemani.
US Supreme Court, December 2025
Gardner v. Maryland
With the Second Amendment Foundation, the NRA, and others, we urged the Court to protect the right to carry across state lines. The Court denied review on April 20, 2026.
US Supreme Court, November 2025
NAGR v. Lamont
Leading a brief with the California Rifle and Pistol Association and the Second Amendment Law Center, we urge the Supreme Court to hear the challenge to Connecticut’s rifle and magazine ban.
US Supreme Court, September 2025
Duncan v. Bonta
With the Second Amendment Foundation and the Second Amendment Law Center, we urge the Supreme Court to hear the challenge to California’s magazine ban.
US Supreme Court, April 2025
Wolford v. Lopez
With the California Rifle and Pistol Association, the NRA, and others, we urged the Supreme Court to hear the challenge to Hawaii’s carry restrictions. On June 25, 2026, the Court struck down Hawaii’s rule banning carry on private property open to the public unless the owner says yes.
10th Circuit, March 2025
US v. Morgan
With the California Rifle and Pistol Association, Gun Owners of America, and others, we argue the Second Amendment’s plain text applies to machine guns.
Minnesota Supreme Court, January 2025
Simon v. Demuth
With Professor Ilan Wurman and others, we argued that a quorum of the Minnesota House was a majority of its 133 elected members. The Court ruled on January 24, 2025 that a quorum requires 68.
9th Circuit, December 2024
US v. Metcalf
With the California Rifle and Pistol Association, the Second Amendment Foundation, and others, we challenged the federal ban on carrying within 1,000 feet of a school. In September 2025, the Ninth Circuit overturned the conviction on statutory grounds, without reaching the Second Amendment question.
9th Circuit, October 2024
Matthews v. City of Los Angeles
With the California Rifle and Pistol Association, the Second Amendment Foundation, and the Second Amendment Law Center, we defended the right of visitors with home-state permits to carry in California. On August 11, 2025, the Ninth Circuit revived the case, holding that Los Angeles’s no-issue carry policy was unconstitutional.
US Supreme Court, September 2024
Snope v. Brown
With the Second Amendment Law Center, the California Rifle and Pistol Association, and others, we urged the Supreme Court to hear the challenge to Maryland’s assault weapons ban. The Court denied review on June 2, 2025, with three justices voting to hear it.
11th Circuit, September 2024
US v. Ayala
With the California Rifle and Pistol Association, the Second Amendment Foundation, and the Second Amendment Law Center, we defended the right to carry in post offices. The government dropped its appeal in August 2025, leaving the ruling that the post office ban is unconstitutional in place.
US Supreme Court, July 2021
NYSRPA v. Bruen
With the Second Amendment Foundation and 11 state gun rights groups. The Court ruled 6 to 3 on June 23, 2022 that the Second Amendment protects carrying a handgun outside the home.
Join the fight
Help us bring the next case
Could you be a plaintiff?
To bring a case we need people directly affected by a law, regulation, or policy to join as a named plaintiff.
Report an infringement
Know of a government entity infringing on your Second Amendment rights? Tell us. We follow up within a few days.
Our partners
In our legal actions we often work closely with the Second Amendment Foundation and the Firearms Policy Coalition.
Fund the fight in court
Our lawsuits and amicus briefs are underwritten by the Minnesota Gun Owners Support Fund, doing business as the MN Gun Owners Law Center, a 501(c)(3). Gifts may be tax-deductible to the extent allowed by law.