DENVER (AP) -- A federal judge in Denver has refused to block a new Colorado state law that limits the size of ammunition magazines.
Judge Marcia Krieger says she can't issue an injunction because the law already is in effect.
She spoke at a hearing on a lawsuit by Colorado sheriffs challenging the law, which went into effect July 1.
The law bans magazines that hold more than 15 rounds. The sheriffs contend it violates the Second Amendment right to keep and bear arms.