DENVER — Gun dealers and owners in Colorado could soon be subject to some of the most restrictive gun-control laws in the country.

Lawmakers in the state are poised to pass a measure that would, with a few exceptions, outlaw the use of detachable ammunition magazines. By doing so, it would make it illegal to buy, sell and manufacture a wide range of firearm models, including rifles, shotguns, pistols and some handguns.

Detachable magazines are devices that allow shooters to reload and fire bullets more quickly. Without them, gun users would have to load bullets into the chamber one by one.