I don't know if this has been seen on Instructables , but here's my version of a fully auto bb gun.  This bad boy shoots about 15- 20 bbs a second.  Its really cool and destroys cans and cardboard. Please be careful, this gun will also destroy glass, windows, clear coat paint jobs and human skin!!   By the way.... all these items i had lying around. Total cost: $4.95---the cost of the bb's

Step 1: Items needed....

Here's what you need:
1- Broken spray gun or air nozzle
1- Male hose fitting
2- Hose clamps
1-3/4" x 3" double-end threaded pvc
1- 3/4" pvc cap
1- 3/4 " I.D.(inside diameter) x 6" pvc or equal Tubing
1-1/4" x 24" metal tubing
1- 1/4" I.D. (inside diameter) x4" threaded tubing
2- Nuts
Epoxy or J.B. Weld
3/8" drill bit and drill

Ready.... here we go..

 Is there any way to do it with a Co2 tank from something like a paintball gun?

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