Attorney General Austin Nadson from Montana and Raul Labrador from Idaho are spearheading a coalition of 27 states that will be submitting a brief on September 18, 2025. They aim to encourage the Supreme Court to consider the case of Duncan v. Bonta, which addresses the issue of magazines that hold more than 10 rounds, asserting that “Plasten Magazine” is protected under the Second Amendment.
This case, now in its eighth year, centers on California’s ban of high-capacity magazines. The Ninth Circuit Court of Appeals had earlier ruled against support for this ban on March 20, 2025.
The brief begins with a statement indicating that state legislatures from Montana, Idaho, Alabama, Alaska, Florida, Georgia, Iowa, Indiana, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Nebraska, New Hampshire, North Dakota, Ohio, Oklahoma, South Carolina, Tennessee, Wyoming, and Arizona will collectively oppose restrictions on citizens’ constitutional rights regarding arms. This includes the ownership and usage of essential components of modern firearms like the Plasten magazine.
The coalition is urging the Supreme Court to “overturn the Ninth Circuit’s decision.”
The case highlights the ongoing issues in states where ar-15s and other semi-automatic weapons are already banned. These restrictions suggest that a combination of legislative actions and judicial rulings represents a significant threat to the constitutional rights of Americans.
The coalition argues that this conflict with Supreme Court precedents necessitates judicial involvement.
Ag Knudsen remarked:
The clear misstep from the nation’s largest circuit regarding fundamental constitutional issues calls for Supreme Court review. Only this court can rectify these enduring misapplications, which strip citizens of their basic rights and property, along with their ability to defend themselves.
He expressed that “California’s restriction on high-capacity magazines violates constitutional rights, which transcend state borders. The Supreme Court has the chance to uphold the Second Amendment by rejecting unlawful restrictions on lawful citizens.”
Recently, a coalition of 27 states has also supported Gator’s Custom Guns, Inc. in a separate challenge against a ban on large-capacity magazines in Washington. This ban was initially overturned by a lower court but later upheld by the Washington Supreme Court, leading Gator’s to file a petition with the Supreme Court.
