Just with a Multitool: Survival slingshot tutorial
Link to win the SOG PowerLock S60 Multitool: http://www.theslingshotforum.com/f13/win-sog-powerlock-s60-multitool-29217/
The Slingshot Channel goes back to the roots: After many very complex contraptions, this video show you how to make a great stone shooting slingshot from a tree fork, some rubber tubing, a patch of leather and some string. The one and only tool used for making the entire weapon is an SOG Powerlock S60 Multitool.
http://www.sogknives.com/type/multi-tools/powerlock-satin.html
The video also shows a new mini slingshot with an integrated 5 rd magazine (8mm steel balls). The truly pocketable weapan can be concealed in the closed fist. Also, the official letter from the Bill & Melinda Gates foundation is shown!
A "The Slingshot Channel" production.