Metal Gear Solid Rubber Band Gun
Some guy went and made a rubberband shooting replica of Solid Snake's Silver Wolf pistol from Metal Gear Solid 4: Guns of the Patriots. The weapon was made from cross-drilled stainless steel plates and even has a laser sight and flashlight. I want one -- just imagine the damage you could do with that thing! Upwards of not any.
Hit the jump for a video of the gun in action.
Thanks to Ryan and Julian, who once killed a bear with slingshots.