I finally got the EL Wire which has a 9V driver. It features an adjustable strobe or constant-on mode and an adjustable dimmer.
It was square and bulky and I couldn’t figure out where to put it. I wanted the gun and tube self contained so it had to fit on the tube somewhere.
I literally spend 5 hours trying to figure it out. Finally I decided to redesign the gun and hide it in the tube. (I don’t think my son liked the plunger anyway!) I cut the driver down and moving the battery area and it fits perfectly inside the tube. I might rig up a switch for it but right now I unscrew the front part of the barrel off which is pretty easy.
Here’s the new and improved gun!! I’ll weather it tomorrow. There is 20 feet of EL wire in there.