What's at stake in the fight over printing files for guns

There's been a lot of news freakout over Defense Distributed (previously) and "3D printed guns" (a term that confusingly encompasses milled guns, 3D printed guns, and files that describe the shapes of guns). Read the rest

This 3D-printed, portable railgun fires slugs at 560 miles per hour

David Wirth 3D printed a 20lb railgun that fires copper-plated tungsten slugs with 1,800 joules of energy, firing them at 560mph, with so much force that they vaporize on contact with a steel-backed target. Read the rest