The state's 21-year age minimum, enacted as part of a 2003 gun control law, had been challenged in a 2021 lawsuit by three gun rights groups - Minnesota Gun Owners Caucus, Firearms Policy Coalition and Second Amendment Foundation - and three individuals.
The plaintiffs argued in their lawsuit that the age minimum violated the Second Amendment because 18- to 20-year-olds were permitted to possess guns at the time of the United States' founding.
Menendez wrote that she had "reservations" about the historical analysis demanded by the Supreme Court, noting that "judges are not historians."
Circuit Court of Appeals recently upheld a 21-year age minimum for handgun purchases in Florida, based on 19th-century laws, but said those laws only concerned gun sales, not the right to carry guns.
Reporting By Brendan Pierson in New York, Editing by Alexia Garamfalvi and Bill BerkrotOur Standards: The Thomson Reuters Trust Principles.