The U.S. Department of Justice has filed a lawsuit against the city of Denver, challenging its ban on so-called “assault rifles” and arguing the policy violates the Second Amendment rights of law-abiding Americans.
At the center of the case is Denver’s prohibition on AR-15-style rifles—firearms that the federal complaint notes are owned by “tens of millions” of citizens across the country. The DOJ contends that these rifles fall squarely within the category of commonly used firearms for lawful purposes, placing them under constitutional protection.
The lawsuit leans heavily on the landmark Supreme Court decision District of Columbia v. Heller, in which the Court affirmed that the Second Amendment protects an individual’s right to possess firearms in “common use” for lawful purposes such as self-defense. By that standard, the DOJ argues, banning an entire class of widely owned rifles is incompatible with constitutional guarantees.
Federal officials also took aim at the language used in Denver’s ordinance, criticizing the term “assault rifle” as politically charged rather than technically precise. The complaint suggests the phrase has been shaped more by advocacy and messaging than by clear legal or firearms definitions, raising concerns about how laws are framed and enforced.
Acting Attorney General Todd Blanche made the administration’s position clear in a statement accompanying the filing.
“The Constitution is not a suggestion and the Second Amendment is not a second-class right,” Blanche said. “Denver’s ban on commonly owned semi-automatic rifles directly violates the right to bear arms. This Department of Justice will vigorously defend the liberties of law-abiding citizens nationwide.”
The case highlights a broader and ongoing legal battle across the United States, as states and municipalities attempt to regulate certain categories of firearms while courts increasingly scrutinize those efforts under recent Supreme Court precedents. Following decisions like Heller—and more recently, rulings emphasizing historical tradition as the benchmark for gun regulations—lower courts have been forced to reevaluate long-standing restrictions.
For Second Amendment advocates, the Denver case represents a critical test. If firearms owned by millions of Americans can be banned at the local level, it raises larger questions about where the line is drawn—and whether constitutional protections can be narrowed through shifting terminology.
Supporters of the lawsuit argue that the issue is not just about one type of rifle, but about the principle itself. If the government can prohibit firearms in common use today, critics ask, what prevents further restrictions tomorrow?
Denver officials, for their part, have defended the ban as a public safety measure, part of a broader effort to reduce gun violence in the city. The courts will now decide whether that justification can withstand constitutional scrutiny.
As the case moves forward, it is likely to become another pivotal chapter in the national debate over gun rights—one that could further define the scope of the Second Amendment for years to come.
