Designer and maker James R. Patrick has tried his hand at developing a 3D printed gun affectionally called the Songbird – 22lr Single shot. Aside from the firing pin, which is a roofing nail, and the spring system, which he designed as made from rubber bands, the entire piece is 3D printed. The folks at FOSSCAD were intrigued by the idea and as part of testing it, substituted condoms for the rubber bands. It appears to be equally effective and a whole heck of a lot more entertaining. For $500 you can get a xyz 3d printer and print this yourself!