Boulder’s two gun stores will not be able to issue certificates to owners of assault weapons that are grandfathered in under the city’s ban on the guns, which took effect last week.

The decision came after a brief discussion among City Council members Tuesday night as they considered tweaks to the ordinance outlawing the sale and possession of assault weapons, bump stocks and high-capacity magazines. Boulder, the council and several city officials are being sued in two separate cases challenging the measure.

Five amendments were proposed. On an 8-1 vote, council passed three: Removing an exemption for 30-round handgun magazines that are legal under Colorado law; allowing competitive shooters to travel through Boulder with assault weapons; and clarifying the language so that any individual not allowed to possess firearms under state and federal law could not receive a certificate of ownership.

Council member Mirabai Nagle was the lone dissenting vote. She opposed banning high-capacity handgun magazines that are legal under state law, grandfathered in via a 2013 measure.

“The gun community is not going to turn in their 30-round magazines,” she said, “so we just turned a bunch more people into criminals.”

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