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if made properly it can shoot through drywall, wood even skin! so dont shoot this at anyone. im not responsible for what you do with this. Supplies- Duct tape, plywood, rubberbands(depends on size of stick) drill, skewers

Step 1: Materials

Picture of Materials
plywood
drill
duct tape
rubberbands
 
These instructions are nice but that bow looks ugly. No offense, dude.