American firm Solid Concepts has created the world's first 3D-printed metal gun and successfully fired 50 rounds.
3D printing - Wikipedia
World's first 3D printed metal gun fires 500 continuous rounds
3D printed guns: Warnings over growing threat of 3D firearms - BBC
World's first 3D printed metal gun tested, firing 50 shots
Dangers and Benefits of 3D Printing — LEB
Revolver - Wikipedia
First 3D-Printed Metal Gun Fired Successfully
The Mystery of the Stamped Steel 1911 -The Firearm Blog
Hurtiglagring
You don't bring a 3D printer to a gun fight -- yet - CNET