This is my first Instructable so please excuse me if its not the best. This Instructable will show you how to build an air gun that will shoot all kinds of things. (I know the title is homemade paintball gun but i havnt tested it with paintballs yet. I hope they dont just pop in the barrel.)Mine cost about 13$ but it may cost more or less. Plus i already had the cement and primer.
YOU WILL NEED..... 1 TIRE REPLACEMENT VALVE (THE THING YOU PUMP AIR INTO ON A TIRE) 1 1IN PVC END CAP 1 3/4IN PVC BALL VALVE 1 3/4IN PVC NIPPLE 1 1IN TO 3/4IN PVC REDUCER 2 1IN PVC TEE 2 1IN 90 DEGREE PVC ELBOWS A LENGTH OF 1IN PVC 6 FEET SHOULD BE ENOUGH FIGURE OUT HOW LONG YOU WANT THE BARREL... YOU WILL NEED A PIECE OF 3/4 IN PVC THE LENGHT YOU WANT YOUR BARREL IF ANY OF YOUR PARTS SCREW ON THEN YOU WILL ALSO NEED PLUMBERS TAPE
*MAKE SURE YOUR PVC IS PRESSURE RATED. IF IT RUPSURES YOULL PROBOBLY BE IN THE HOSPITAL HAVING PVC DUG OUT OF YOU. I AM NOT RESPONSIBLE FOR AANY DAMAGE YOU DO. THIS COULD BE VERY DANGEROUS. TREAT IT LIKE A REAL GUN.