United States Attorney Damien M. Diggs, along with partner agencies, announced Monday a crackdown on machine gun-conversion devices. Dubbed Operation Texas Kill Switch, the initiative aims at awareness and educating the public on the thimble-sized devices commonly made by a 3D printer using a plastic filament. “It fires faster than the standard M4 machine guns issued to U.S. military service members,” Diggs said. Under federal law, a machine gu…