RE: Potato Guns
no they arents illegal to my knowledge. to build one take some pvc pipe about 3 inches in diameter and about 2 feet long. then take some from 4-5 inches in diameter and about a foot long and connect the 2 with an adapter. you will need the end of the 4-5 inch piece that is not connected to the 3 inch piece to have threads on the end so you can screw a cap on after you put the spray in. then take a grill switch with the button you push to make the spark anywhere in the bigger chamber but more towards the back. take a potato, stick it in the smaller end, spray some hairspray in the big chamber close the cap and push the switch and off goes the potato.