Step 1: What You Need.
what you need.
1 piece of 1.5in, 2 foot long pvc pipe.(make sure your pipe is strong and thick so it doesn't blow up because were using compressed air.
another piece of 1.5in pvc pipe but this time 20 inches long.
a 1.5in end cap.
1.5in pvc ball valve
a bicycle tire valve
and cold weld.
Step 2: What to Do.
drill a hole on the end cap to were you can put the small end through but the large end won't fit. put glue around it where it stays. then put cold weld around the rubber part but not the metal part to make sure no air escapes.
connect the 20 inch piece to one end of the ball valve and then to 2ft pipe on the other end of the valve.
connect and glue every thing normally but then after it dries put cold weld around every seem to make sure no air escapes.
Step 3: Firing and Ammo
get an air pump or a bicycle pump and close the valve all the way. the safe amount is 150 psi so don't do to much at the risk of injury. (I AM NOT REPSONSIBLE FOR INJURIES!!!)
when you stick the projectile in the barrle 1st make sure the gun is not aired up. 2nd if it doesn't go down all the way push it down to the end for a better shot.
also you can shoot a shower of paintballs or airsoft bbs by droping some of them into the barrle.
to fire air it up and then turn the valve.
test it first to make sure it doesn't shoot to hard so you don't hurt your friend.(and i even suggest that you don't shoot your friend with a slug, just with a shower of bbs insted.
have fun airsofting!