Interesting build for a portable crossbow/slingshot combo. (must be on the zombie thing today) It looks straight forward to build, and is pretty portable…hummm. watch the video for more below Only which the guy had his plans online.
http://www.youtube.com/watch?v=YhS35kOsmyU&feature=youtu.be
http://gizmodo.com/5986566/survive-in-style-with-this-foldable-emergency-crossbow-slingshot