I was initially planning to 3D print a gun enclosure for it, but decided on a simple laser cut design instead. This screenshot is from FreeCAD where I am working on my initial concept. A laser cut design is easier to produce copies as 3D printing would be very slow. My aim with the design is to keep it simple and make it easy for anyone to add their own shapes and addon modules easily, Later on when I want to make it look more sci-fi, I will add some 3D printed parts, LEDs and so on.

I've not decided on a battery back yet. I'd like to keep the overall size small, so may use some small li-po packs and possibly a DC-DC step up module for the extra long sparks