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Eighteen States, Law Enforcement, Doctors, and Firearm Rights Groups File Amicus Briefs in Lawsuit Challenging California 10+ Magazine Ban

Tuesday, January 16, 2018

Eighteen States, Law Enforcement, Doctors, and Firearm Rights Groups File Amicus Briefs in Lawsuit Challenging California 10+ Magazine Ban

On Friday, January 12, several amicus briefs were filed in the NRA and CRPA supported lawsuit challenging California’s restrictions against magazines capable of holding more than 10 rounds. The lawsuit, titled Duncan v. Becerra, challenges California’s recently enacted ban on the possession of magazines capable of holding more than 10 rounds as a result of Proposition 63, as well as all of California’s other restrictions on such magazines. The lawsuit challenges the restrictions as a violation of the Second Amendment, Due Process clause, and Takings clause of the United States Constitution. 

Less than three days before California’s ban on the mere possession of magazines capable of holding more than 10 rounds was scheduled to take effect, San Diego Federal District Court Judge Roger T. Benitez issued an order granting NRA and CRPA attorney’s request for an injunction while the lawsuit is pending. As a result, California gun owners who currently possess such magazines may continue to do so without fear of prosecution while the constitutionality of the law is decided in the courts. Unsurprisingly, the California Department of Justice has appealed the injunction to the Ninth Circuit. 

In support of the plaintiffs are 18 States, including Arizona, Alabama, Arkansas, Georgia, Idaho, Kansas, Louisiana, Michigan, Missouri, Montana, North Dakota, Ohio, Oklahoma, South Carolina, South Dakota, Utah, West Virginia, Wyoming, filed an amicus brief illustrating how the Second Amendment protects magazines capable of holding more than 10 rounds and how California’s restrictions constitute a “taking” which requires just compensation to affected owners. 

Several Law Enforcement and State and Local Firearm Rights groups also filed an amicus brief highlighting how California’s restrictions will not reduce violent crime, but instead will increase the danger to victims. The brief also states how magazines capable of holding more than 10 rounds are not disproportionately used in attacks on law enforcement, and that California has failed to show that its restrictions will reduce mass shootings and injuries. The listed groups participating as an amicus include:

 

California State Sheriffs Association

Western States Sheriffs Association

California Reserve Peace Officers Association

San Francisco Veteran Police Officers Association

California Gang Investigators Association

International Law Enforcement Educators and Trainers Association

Law Enforcement Legal Defense Fund

Law Enforcement Action Network

Law Enforcement Alliance of America

International Association of Law Enforcement Firearms Instructors

Association of New Jersey Rifle & Pistol Clubs

Bridgeville Rifle & Pistol Club

Connecticut Citizens Defense League

Delaware State Sportsmen’s Association

Gun Owners Action League Massachusetts

Gun Owners of California

Hawaii Rifle Association

Illinois State Rifle Association

Missourians for Personal Safety

New York State Rile & Pistol Association

Vermont Federation of Sportsmen’s Clubs

Vermont State Rifle & Pistol Association

Virginia Shooting Sports Association

Western Missouri Shooters Alliance 

Doctors for Responsible Gun Ownership, the Independence Institute, Millennial Policy Center, and the National Rifle Association Freedom Action Foundation also filed amicus briefs, each detailing how magazines capable of holding more than 10 rounds are in common use and therefore protected under the Second Amendment. 

To stay up to date on the Duncan lawsuit, as well as other important Second Amendment issues here in California be sure to check your inbox as well as the Stand and Fight California webpage.

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Connecticut’s “Convertible Pistol” Ban Picks up Where California’s Overreach Left Off

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Monday, February 23, 2026

Connecticut’s “Convertible Pistol” Ban Picks up Where California’s Overreach Left Off

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Minnesota: Hearing on Semi-Auto and Magazine Bans Next Week

Friday, February 20, 2026

Minnesota: Hearing on Semi-Auto and Magazine Bans Next Week

On Tuesday, February 24th, the House Public Safety Finance and Policy committee will hold a hearing on two all-encompassing ban bills, House File 3433 and House File 3402

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Monday, February 23, 2026

Firearms Industry “Responsible Controls” Legislation is an Existential Threat to Gun Owners

Anti-gun activists think they have figured out a way around the Second Amendment, democratic accountability, and the federal Protection of Lawful Commerce in Arms Act (PLCAA) to impose a limitless raft of gun control on ...

Virginia: Gun Bill Updates As Crossover Deadline Arrives

Tuesday, February 17, 2026

Virginia: Gun Bill Updates As Crossover Deadline Arrives

Today, February 17th is the legislative crossover deadline in Virginia, and any bills that have not left their chamber of origin by the end of the day are considered dead for the session.

Virginia Gun Owners Face Magazine Confiscation!

Monday, February 2, 2026

Virginia Gun Owners Face Magazine Confiscation!

Astute Virginia gun owners anticipated terrible gun control legislation from the 2026 General Assembly. Still, some may be shocked to learn that anti-rights zealots in the Virginia Senate have advanced a bill to CONFISCATE standard capacity firearm ...

Breach of Canadian Firearm Owners’ Data: The Latest in a String of Failures

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Monday, February 23, 2026

Breach of Canadian Firearm Owners’ Data: The Latest in a String of Failures

Canada’s gun owners have no reason to trust the federal government, and whatever misplaced faith remains took a huge hit when details of a cybersecurity breach at the Canadian Firearms Program became public.

Minnesota: Gun Control Bills Stall in Committee

Wednesday, February 25, 2026

Minnesota: Gun Control Bills Stall in Committee

Following committee votes on Tuesday, February 24th, and Wednesday, February 25th, many of the most egregious gun controls bills in the legislature have stalled and may not receive further action this session.

Oregon: Floor Vote TODAY on Ballot Measure 114 Override Bill - LAST CHANCE TO TAKE ACTION!

Monday, February 23, 2026

Oregon: Floor Vote TODAY on Ballot Measure 114 Override Bill - LAST CHANCE TO TAKE ACTION!

Today, HB 4154 is scheduled for third reading and a vote on House Bill 4145, the Ballot Measure 114 override bill. This is the last opportunity for Second Amendment advocates to oppose this bill in the ...

NRA Files Amicus Brief to Protect Gun Owners’ Private Information

Wednesday, February 18, 2026

NRA Files Amicus Brief to Protect Gun Owners’ Private Information

Today, the National Rifle Association and Second Amendment Foundation filed an amicus brief in Hall v. Sig Sauer, urging a Pennsylvania federal court to reconsider an order requiring Sig Sauer to disclose its customers’ names and ...

Virginia: Multiple Gun Control Bills Advance in Senate

Tuesday, January 27, 2026

Virginia: Multiple Gun Control Bills Advance in Senate

On Monday, January 26th, the Senate Courts of Justice Committee advanced a slate of gun control bills targeting semi-automatic firearms, standard capacity magazines, carry rights, home storage, and more.

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Established in 1975, the Institute for Legislative Action (ILA) is the "lobbying" arm of the National Rifle Association of America. ILA is responsible for preserving the right of all law-abiding individuals in the legislative, political, and legal arenas, to purchase, possess and use firearms for legitimate purposes as guaranteed by the Second Amendment to the U.S. Constitution.