Turret

Arent firestorm cranks supposed to create a turret affect or something? Anways, you could find a way to mount a pole/rod into a front grip of either tippmann model (98c, A5) and mount it to a board. Put a big box on top and a big CO2 tank behind you and go at it.

My friends and I thought about doing this so we could then mount it to a 4-wheeler and do drive-bys....

http://www.rustyspaintballgear.com/rs/catalog/details.asp?ID _Wep=106

Here you go. Portable and awesome but expensive and probably allowed next to nowhere. You could just use the pictures as a guide and make your own design (like instead of a 52mm cannon, it could be a suped up 98 like boonies_baller said). That would actually be pretty cool to se made; it'd be like a German 20mm Flak (like in Saving Private Ryan). Look nice in a D-Day scenario.

If you wanna make a warthog style turret, here's the way to go.

Start with a stock A5. Add a flatline barrel and e-grip. Now, mount a collar around the flatline shroud, and attach three sections of 1" PVC piping around it at equal intervals, to get the multi-barrel look. Get a sheet of plywood, paint it black, and cut it out in the shield design, and mount that just behind the collar. Finally, mount it on a pivoting base, and you're done.

That's the simple version. If you want to be the COOLEST kid on the block, though, here's what you do.

Start as previous w/ the flatline egrip A5. Instead of mounting the PVC and the shield on the A5, though, instead built a mount so that thos are seperate form the marker. What you want to do now is build the thre PVC sections onto some kind of rotating collar. Get an old power drill or something for a motor, and hook up a power souces and a switch so that when you pull the A5's trigger, the motor will be turned on, and the three PVC barrels will rotate around the A5 flatline shroud.

As you get more money for upgrades, you can change ammo sources. Get rid of the hopper and replace it with an adapter so youc an run a warp feed to the A5. Buy an old surplus .50 calibre ammunition can from a surplus store or Ebay. Mount the warpfeeder in or under the ammo can, and load it up with paintballs, so it dumps them into the warp feed. That gives you a thousand or more paintballs,a dn the reload you jsut open the ammoc an and dump another bag in.

Really, this is limited more by your creativity than your budget. Even just a stock A5 with a flatline is a good start, once you've added on some cosmetics. Rate of fire won't be much though. Later you can add an egrip, or an Rt, or whatever triger mods you can to do. A lot fo this stuff can be found at a good price on Ebay.