In April, the Chicago suburb of Deerfield, Illinois voted to ban assault weapons and fine violators up to $1,000 a day.
On Tuesday, Boulder's City Council unanimously passed a ban on the sale and possession of assault weapons, high-capacity magazines and bump-stock devices -- even while attorneys from a pro-gun rights group threatened legal action.
At that point, all firearm owners who have proven that they owned their assault weapons prior to the passage of the new ban will be permitted to keep them.
According to the Daily Camera, the group's attorneys threatened legal action during the open comment section preceding the vote "on behalf of an unnamed client, alleging 'violations of the Second, Fifth and 14th Amendments,'" as well as the Colorado state constitution.
"My hope is that we will see more bans at the state level and one day at the federal level so these weapons will no longer be available," Boulder Councilman Aaron Brockett reportedly stated at the vote.