A 3D printed rifle created from the Defense Distributed design for a 3D printed gun has fired semi-sucessfully.
YouTube
This is a fully 3D printed rifle I designed. I call it The Grizzly after the Canadian built Sherman Tanks of WWII. It is a single shot .22LR incorporating the coiled mainsprings of the Liberator by Defence Distributed. Like the Liberator the only metal is a 1″ roofing nail.
In this first test it fired off a Winchester Dynapoint but the barrel split along both sides for about 2″ and the top of the receiver split the same amount.
Some changes will need to be made on the next.
http://youtu.be/Ow3lO_ViXkk