Incredible paper guns exhibited last year at the Craze Gallery on Portobello Road in London.
About the project, via Craze Gallery:
"The weapons in the Death Machines series embody the highest values of 'good design'; good engineering, reliable performance, robust construction. They are icons of design that have not only shaped global conflicts but also our collective aesthetic sensibilities through countless films, TV shows and news images. The Death Machines paper kits bring the contradictory experience of weapons into the home; admirably designed and aesthetically fascinating and simultaneously terrifyingly in their lethality..."
Make your own: kits available at Gestalten.