After finding that the majority of the ghost traps on here are either not accurate, or too cartoonish to wear on your belt as an actual cosplay prop, I decided to rework an existing one to be both accurate, and easy to print.

I've used a Miniature Ghost Trap model from Thingiverse made by Guillaume1986 as a starting point and worked up from there.

I take no credit in creating this model at all.

Visit my Profile for other Ghostbuster Cosplay items!

After a few prototypes, I've finally made this FULL SIZE Trap replica that can still be printed on just two plates! (I also have a Small/Child Sized trap on my profile)
The rear box & handle have been sliced into two pieces, but with some good sized dowels to make sure the two halves are glued together solidly, but also perfectly lined up.

Please also be aware the doors are STATIC - they will not open, and there's no room inside for smoke machines etc - this is purely designed as a belt hanging prop to complete your look. I'll continue to play with it to see if I can't get working doors on there in the future.

The cartridge is removable, in case you wanted to play with depositing the ghost trap into a containment unit or such.

It can be glued down to fix it in permanently, or you could use magnets to hold it in place.

Enjoy! 
If you have any problems, leave me a comment and I'll see if I can fix them for you.