Breakthroughs, discoveries, and DIY tips sent every weekday ... I built my own take on Lewis’ weapon out of PVC piping. A small piece of pipe serves as the air reservoir. A water-sprinkler ...

At 200 feet per second. We need to take a minute and say [Elliot]’s gun is stupidly unsafe. He used PVC pipe to hold air pressure, so that may… explode one of these days. Also, the AA ...