One step closer to an open-source assault rifle: A 30-round 3D-printed magazine

One step closer to an open-source assault rifle: A 30-round 3D-printed magazineDefense Distributed, the project that aims to release an open-source, print-it-yourself assault rifle, has succeeded in 3D-printing a high-capacity AR-15 magazine, dubbed Cuomo. The magazine has so far survived the firing of 342 rounds — 227 of which were in full auto mode.