In 1987, a 22-year-old Venezuelan named Jorge Leon invented a small metal insert that could turn the Glock 17 semi-automatic pistol into a fully automatic machine gun with the flick of a switch. Leon ...

Glock switches — tiny devices that turn pistols into machine guns — are on the rise in Ohio and across the country. Some are used by backyard gun enthusiasts. Others are used by criminals. A Glock ...