The Boulder City Council unanimously passed a sweeping gun control ordinance Tuesday night banning “assault weapons” and bump stocks, even as a pro-Second Amendment group threatened to retaliate by suing individual councilmembers.

In a surprising turn, one Colorado councilwoman admitted that she disagreed with the ordinance “in many ways,” saying it would invite a flood of litigation — despite voting for it.

The city defines assault weapons as “semi-automatic firearms designed with military features to allow rapid spray firing for the quick and efficient killing of humans.”

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