New, better video:
This is my golfball gun, it features a 2" barrel sealing piston with 1.5" porting. The chamber is made from 2" Pressure Rated PVC pipe and the barrel is 1.5" PVC pipe. For more information go to:
Big Thanks to Nicholas Benigni, owner of SpudGunExtreme.com
You can find his website and spudgun products here:
Note: In the video I am wearing safety glasses you just can't see me, the shot at the end without them is perfectly safe as I was only firing air.
I also have more then enough objects as a back stop to make certain the projectile doesn't go all the way.
One shot I am firing into the open, I was shooting a golfball 380m at a golf course that was closed due to weather 50m away.
You may need to use some Lube to help the piston slide easier: