http://en.wikipedia.org/wiki/Rubber_band_gun

http://www.pointlessbutcool.com/gadgets/rubber_band_gatling_gun

http://www.rubberbandguns.com/

http://www.claytonbailey.com/popgun.htm

http://www.neatstuff.net/guns/Toy-Guns-2.html

http://www.popguns.com/

http://www.thetoybox.com/proddetail.php?prod=GL1JR108

http://www.kitestailstoys.com/home.php?cat=395&gclid=CNW3oO3h54cCFR1sWAodRzmRAQ

http://www.backyardartillery.com/machinegun/plans.php