Based on my original "PVC Deadly Nerf Dart Blowgun", this video takes that relatively simple project and ups the ante considerably. By utilizing a 4" by 12" PVC air reservoir, much more air pressure can be delivered to the Nerf darts than a pair of lungs could hope to. An old Ryobi cordless drill sans motor serves as the gun grip, trigger, and battery. When the trigger is pulled, the battery powers up an Orbit brand 1" sprinkler valve which releases the pressurized air into the 1/2" PVC barrel and propels the projectile towards the target.
With this much power pushing the Nerf darts, they exhibit signs of instability in flight and sometimes tear apart. The next phase of this project will focus on coming up with a better performing projectile.