For the last hour, in a backroom of a gun range in Arabi, Louisiana, I’ve been building Luigi Mangione’s gun. The intention of this experiment is to see for myself just how far 3D-printed guns have come. This includes everything from the trigger assembly to the slide and barrel that ride on top of the Glock-style pistol’s plastic-printed body. Then PSR watches as I struggle to pull that top half of the firearm into position. I yank back on the chunk of metal, exposing the empty chamber that will soon be filled by a 9-millimeter round.