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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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CPRC’s Latest Report Outlines the Robust State of Concealed Carry in America

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Monday, December 22, 2025

CPRC’s Latest Report Outlines the Robust State of Concealed Carry in America

Dr. John Lott’s Crime Prevention Research Center (CPRC) has released its latest annual report on the state of concealed carry in the United States. 

Minnesota: Governor Walz Issues Two Gun Control Executive Orders

Tuesday, December 16, 2025

Minnesota: Governor Walz Issues Two Gun Control Executive Orders

With the holiday season upon us, former VP candidate Governor Tim Walz has once again proven his "Bah Humbug" stance on the Second Amendment. 

DOJ (Again) Goes to Court to Defend 2A

News  

Monday, December 22, 2025

DOJ (Again) Goes to Court to Defend 2A

We recently reported that the Department of Justice (DOJ) announced it had created a new section under its Civil Rights Division—the first ever dedicated to protecting the constitutional right to keep and bear arms.  

DOJ Defends Federal Firearms Registration in NRA Challenge to the NFA

Thursday, December 18, 2025

DOJ Defends Federal Firearms Registration in NRA Challenge to the NFA

In the NRA’s case, Brown v. ATF, the Department of Justice filed its opposition to the plaintiffs’ motion for summary judgment, along with its own cross-motion, defending the National Firearms Act of 1934’s registration requirement for suppressors, short-barreled ...

SCOTUS Denies Cert in NRA-ILA Challenge to NFA Short-Barreled Rifle Restrictions

Monday, December 15, 2025

SCOTUS Denies Cert in NRA-ILA Challenge to NFA Short-Barreled Rifle Restrictions

The U.S. Supreme Court denied certiorari in Rush v. United States, a challenge to the National Firearms Act of 1934’s restrictions on short-barreled rifles.

Evidence of Firearm Industry “Debanking” Uncovered as Trump Administration Takes Aim at Discriminatory Practices

News  

Monday, December 22, 2025

Evidence of Firearm Industry “Debanking” Uncovered as Trump Administration Takes Aim at Discriminatory Practices

President Donald Trump issued an Executive Order earlier this year on “politicized or unlawful debanking” and so-called “reputational risk” assessments that financial institutions used in denying services because of a customer’s political or religious beliefs ...

Gun Control Advocate to Lead Duke Center for Firearms Law

News  

Monday, December 22, 2025

Gun Control Advocate to Lead Duke Center for Firearms Law

“Developing Firearms Law as a Scholarly Field” is a worthy endeavor and exactly what the Duke Center for Firearms Law proclaims on their website as the Center’s mission. 

North Carolina: Update on Permitless Carry

Tuesday, December 16, 2025

North Carolina: Update on Permitless Carry

In September, the North Carolina General Assembly briefly returned from recess and re-referred Senate Bill 50, Freedom to Carry NC, to the House Rules Committee.

Virginia: Gun Control Looms on the Horizon – Make Plans to Attend Lobby Day in January!

Monday, December 22, 2025

Virginia: Gun Control Looms on the Horizon – Make Plans to Attend Lobby Day in January!

Anti-gun legislators in Richmond have already begun filing legislation ahead of the upcoming Virginia General Assembly session. 

New Jersey: Senate Vote on Gun Bills Scheduled for Next Week

Friday, December 19, 2025

New Jersey: Senate Vote on Gun Bills Scheduled for Next Week

The gun-grabbing grinches of Trenton do not take a holiday break from trying to steal more rights from Garden State gun owners. As lawmakers spend December wrapping up a “lame duck” session, many gun bills ...

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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.