Ya know what it's SCREAMING for though??
Take a fat white BIC pen, the kind typically sold in packs at Walmart... Think they call them BIC sticks IIRC... anyway, take the pen apart, save the tube and end cap (actually save all of it because you can use the other parts for other stuff, but I digress).
Cut about an inch long piece of the pen tube off. That's the main body of your Gatling gun. Get a box of toothpicks, and take about 7 toothpicks and lay them out for trimming. Cut the entire ogive tip off one about say almost half an inch from the ends to make it a "dowel rod". This one will be the "center" of the Gatling barrel assembly. Trim the very tips off the other toothpicks with the hobby knife-- I leave only snip off the last 1/8 inch or so to leave part of the taper there for a neat 'mean looking' effect. These are the gun barrels. Glue two of them to either side of the central 'axle' toothpick dowel mentioned earlier. Once that's dry, glue the rest of the toothpicks around the central axle toothpick dowel to finish the barrel assembly off. Once dry, test fit the assembly into the "main body" of the gun (the BIC pen tube) and sand or shave a bit off the end with the hobby knife if required for a good fit. Glue it into the pen tube. I cut a 'band' off the end of the leftover pen tube about 1/8 inch long for a 'bearing' that I put about 1/4 of the length of the barrels from the "nozzle ends" just to make sure everything's strong and a bit easier to glue to the rocket. The pen's "plug" in the other end of the tube is pushed out and installed on the open end of the gun 'body' for a nice finished look.
You could probably make these using launch lugs and other such tubes as well, which would probably be a little lighter and easier to glue than the plastic pen tubes as well.
You can use the ball point and tapered part of the BIC stick pens to make dandy "rocket pods" or "cannons" for your models as well-- carefully remove the ink tube (so you don't get covered with ink) and put the ball point and tapered adapter back on a short length of pen tube, with the end plug installed in the back. Paint to suit. The tapered end looks a lot like the conical front cylindrical 'rocket launchers' on Hind helicopters and various cannons often seen in sci-fi shows...
I've got a model I built with them *somewhere* I'll have to look it up and post pics... Good luck! OL JR
The X-87B Cruise Basselope- THE ultimate weapon in the arsenal of homeland defense and only $52 million per round!