DOJ Sues Denver and Colorado Over Assault Weapons and Magazine Bans
Justice Department sued Denver and Colorado, challenging Denver's assault-weapon ordinance and Colorado's 15-round magazine limit as violating the Second Amendment.

'The Constitution Is Not a Suggestion': DOJ Takes Aim at Denver's Assault Rifle Ban

DOJ Sues Colorado Over Firearm Magazine Ban

DOJ Sues Colorado Over Law Restricting Capacity of Rifle Cartridges

Trump Administration Sues Blue State Over Gun Magazine Ban
Overview
The Department of Justice sued the state of Colorado on May 6, 2026, challenging its ban on magazines holding more than 15 rounds, the Justice Department said.
The Justice Department filed a related lawsuit on May 5, 2026, against the City of Denver over its ordinance banning certain semi-automatic "assault weapons," the department said.
Acting Attorney General Todd Blanche and Assistant Attorney General Harmeet Dhillon called the bans unconstitutional, while Denver Mayor Mike Johnston and Colorado Attorney General Phil Weiser called the suits federal overreach, officials said.
Denver's assault-weapon ban dates to 1989 and Colorado limited magazines to more than 15 rounds in 2013, a law the Colorado Supreme Court unanimously upheld in 2020, court records show.
The DOJ asked the U.S. District Court for the District of Colorado to bar enforcement and order new policies, and the cases remain pending, filings show.
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