How does the proposed law define 'assault weapons'?

As City Attorney Tom Carr has drafted it, "assault weapons" are defined as:

• All semiautomatic rifles that have the capacity to accept a detachable magazine and that have any of the following characteristics: a pistol grip or thumbhole stock; a folding or telescoping stock; or any protruding grip or other device to allow the weapon to be stabilized with the non-trigger hand.

• All semi-automatic center-fire pistols that have any of the following characteristics: the capacity to accept a magazine other than in the pistol grip or any device to allow the weapon to be stabilized with the non-trigger hand.

• Any firearm that has been modified to be operable as an assault weapon as defined by the city, plus any part or combination or parts designed to convert a firearm into an assault weapon.

Editor's note: This story has been updated to include the Boulder police policy concerning open-carry laws as they applied to the department's handling of Saturday's protest.

Pro-gun demonstrators — many of them carrying versions of weapons that would become illegal in Boulder under a proposed ban on assault-style weapons[1] — lined Broadway in downtown Boulder on Saturday afternoon to voice their displeasure.

"This demonstration is because of the extremes that the Boulder City Council is going to," organizer Jason Boros said. "If they weren't, I wouldn't be out here."

The city council has already passed a first reading of an ordinance that will prohibit the sale and possession of numerous kinds of semi-automatic rifles and handguns that have been categorized as "assault weapons."

Many of the demonstrators carried AR-15-style rifles, a weapon that is popular among gun enthusiasts but has, however, gained notoriety

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