The devices, sometimes referred to as Glock switches, enable handguns to act like machine guns, firing more than one shot with a single pull of the trigger.

Those devices, some called "Glock switches," can be installed on handguns to automatically fire more than one shot, without manual reloading, by a single pull of the trigger.

AL.com’s “Beyond the Violence” project, in partnership with The Birmingham Times, examines how Birmingham can become safer, ...