Watch This Guy Fire 600 Rounds With A Partially 3-D Printed Gun

Defense Distributed's new demonstration of their improved 3-D printed gun with a large capacity magazine seems designed to confound--and throw a middle finger to--Congress, which is trying to ban high-capacity magazines. The agents provocateur at Defense Distributed welcomed Congress back from recess by releasing a video of a brand new 3-D printed AR-15 receiver being used to fire multiple 100-round magazines. The video, embedded below, features a gun being fired for almost the video's entire 3-...