Solid Concepts built a 1911 pistol with a 3D printer. The barrel has to withstand 23,000 psi pressure (to comply with SAAMI specs), so it's a stressed part, fo

Solid Concepts built a 1911 pistol with a 3D printer. The barrel has to withstand 23,000 psi pressure (to comply with SAAMI specs), so it's a stressed part, for sure. http://www.cnn.com/2013/11/08/tech/innovation/3d-printed-metal-gun/ http://www.cnn.com/2013/11/08/tech/innovation/3d-printed-met...