Boulder’s City Council unanimously passed a ban on assault weapons, even as it faced down a threat of legal action during Tuesday night’s meeting.

Attorneys from Mountain States Legal Foundation, speaking during the open comment section preceding the vote, vowed to challenge the ban in court on behalf of an unnamed client, alleging “violations of the Second, Fifth and 14th Amendments, (and) the Colorado Constitution.”

Cody Wisniewski, a staff attorney for the foundation, said individual council members would be named in the suit as well.

The ordinance prohibits the sale and possession of assault weapons, as defined by the city. Also outlawed are magazines with high-capacity magazines and bump stocks.

Owners of the latter two items will have until July 15 to dispose of or sell them. Assault weapons will be grandfathered in; those in possession of such firearms have until the end of the year to receive a certificate proving prior ownership.

The grandfather clause was an olive branch to gun owners, said Councilman Sam Weaver, as was the abandonment of an early proposal to establish a registration system for assault weapons in the city.

Read the full story at dailycamera.com.