Colorado’s Magazine Ban Under Fire: Attorney General Vows to Fight DOJ Lawsuit
Colorado is locked in a high-stakes legal battle with the U.S. Department of Justice (DOJ) over the state’s restrictions on high-capacity ammunition magazines. The federal government is challenging the legality of the ban, arguing it infringes upon Second Amendment rights. In response, the Colorado Attorney General’s office has signaled its intent to vigorously defend the law, framing it as a critical tool for public safety and the prevention of mass casualty events.
The Core of the Dispute: What is the Large-Capacity Magazine Ban?
The controversy centers on a Colorado law that prohibits the sale, transfer, and possession of “large-capacity magazines.” Under this regulation, magazines capable of holding more than 15 rounds of ammunition—manufactured after 2013—are illegal. The law aims to limit the number of shots a shooter can fire before needing to reload, which proponents argue reduces the lethality of mass shootings.
While the law has been in place for years, the current challenge from the U.S. Department of Justice represents a significant escalation in the conflict between state-level gun control measures and federal interpretations of constitutional rights.
The DOJ’s Challenge and the Second Amendment
The Department of Justice argues that the magazine limit is an unconstitutional burden on the right to keep and bear arms. This legal strategy follows a broader national trend where the federal government and various courts are applying the “text, history, and tradition” standard established by the Supreme Court in NYSRPA v. Bruen.

The DOJ’s position is that magazines are essential components of a firearm’s functionality. By limiting capacity, the government contends that Colorado is restricting a common means of self-defense, thereby violating the Second Amendment. This challenge puts Colorado in the company of several other states facing similar litigation over magazine limits and “assault weapon” bans.
Why Colorado is Fighting Back
The Colorado Attorney General’s office maintains that the ban is a reasonable and necessary restriction to protect the public. The state’s legal defense rests on the premise that the Second Amendment is not absolute and that the government has a compelling interest in reducing the scale of gun violence.
The state argues that high-capacity magazines are primarily designed for military use and provide little additional benefit for self-defense while significantly increasing the danger to the general public during violent attacks. By defending this law, Colorado is attempting to establish a legal precedent that public safety imperatives can justify specific limits on firearm accessories.
Key Takeaways
- The Law: Colorado bans magazines holding more than 15 rounds made after 2013.
- The Conflict: The DOJ claims the ban violates the Second Amendment; Colorado claims it is essential for public safety.
- The Stakes: The outcome could influence how other states regulate firearm accessories and how federal courts interpret the Bruen decision.
- State Stance: The Colorado Attorney General has pledged to fight the lawsuit to maintain the existing prohibition.
Frequently Asked Questions
Does the ban apply to all magazines?
No. The law specifically targets magazines that hold more than 15 rounds and were manufactured after 2013. Magazines produced before that date are generally exempt.
What happens if the DOJ wins?
If the court rules in favor of the DOJ, Colorado’s large-capacity magazine ban would likely be struck down as unconstitutional, making it legal to possess and sell these magazines within the state.

Is this part of a larger legal trend?
Yes. There is an ongoing nationwide legal clash between states implementing stricter gun control laws and federal or private challenges based on a broadened interpretation of the Second Amendment.
Looking Ahead: The Legal Path Forward
This case is expected to move through the federal court system, where it will likely be scrutinized under the strict standards of the current Supreme Court. The result will not only determine the legality of magazine limits in Colorado but will also serve as a bellwether for the viability of state-level gun restrictions across the United States.
As the litigation progresses, the focus will remain on whether the state can provide sufficient historical evidence or a compelling safety justification to override the federal government’s constitutional objections.