Baltimore is suing Glock over design features that allow its handguns to be easily modified to become fully automatic weapons.

Maryland and the city of Baltimore sued Glock on Wednesday, seeking to force one of the country's largest gun sellers to take steps to prevent owners from modifying its products into automatic weapons resembling machine guns.

It’s referred to as a “Glock switch,” which can turn a handgun with a 15-round magazine into much, much more. “A dime-sized device that turns a handgun [into] a weapon capable of firing 1,200 rounds per minute,