This BB machine gun is powered by an air compressor and can shoot about 500 BB's in a couple of min. Fairly accurate and has a range of about 200 feet!!! Slices, dices, and rips em' new ones!
Step 1: The Parts
First off, this is not an easy build, it takes patience and craftsmanship to get it all together.
The parts I used on this gun are pvc pipes (rated at least 400 PSI!)Including the pvc drain trap and all reducers/splicers.
All of the brass fittings need to be npt(national pipe thread)I used 3/4".
As for the stock and the barrel, the came off an old pump action bb gun, but those were just to make it cooler.
The trigger is a blow gun, and the laser sight is optional.
The most important part of this is the VORTEC BLOCK, which itself takes some time to make.
Step 2: Vortex Block
The basic theory of operation of the gun uses a vortex block that when air pressure is applied it spins the bbs around very fast untill one of them lines up with the barrel and flies out of the gun.
The link below describes in detail how to construct a vortex block, its kind of like a powerball machine on crack.
Step 3: The Gun
With this gun you can make your own design or copy mine.
Cut all of your pvc out and dry fit before gluing together with pvc cement.
The butt of the gun is attached with a long bolt with rubber washers inside of the drain to prevent air leaks. And a bondo spacer to match the parts shapes together.
I attached the blow gun using plumbers tape.
I will be adding to the actual construction process soon!