(Wall Street Journal) – 3D-printed weapons—like the one police believe suspect Luigi Mangione used—are increasingly common

The homemade handgun and suppressor that police say was used in last week’s killing of a UnitedHealthcare executive is intensifying the debate over the growing presence of such firearms in the U.S. 

The suspect in Brian Thompson’s death, Luigi Mangione, was arrested Monday in Altoona, Pa., carrying a 9mm handgun and silencer that appeared to have some parts made in a 3-D printer, according to New York Police Department Chief of Detectives Joseph Kenny. Police said they believed the so-called ghost gun was the weapon used in the shooting outside a Manhattan hotel. (Read More)