Guy creates handheld railgun with a 3D-printer
 

YouTube user "Xtamared" built a partly 3D-printed railgun that can fire aluminum or graphite projectiles at over 250 meters per second (560 mph). No, this isn't Quake, and it's no janky, all-plastic weapon, either. The "handheld" weapon houses six...

http://www.engadget.com/2015/10/19/3...dheld-railgun/