Warning: There have been several reports of problems slicing one of the pieces. I no longer have the source files to fix this. Since this is such a huge print, verify you can slice all pieces before you start printing. Thanks, and sorry.
Based on Roboduck's Portal Gun ( http://www.thingiverse.com/thing:8809 ), this is a full scale portal gun sliced into pieces which will fit into a 130x130x130mm build volume. On most of the pieces I included pegs and sockets to help align the assembly.
I did this as a prop for a costume. It's not perfect, because I didn't have time to clean up all the parts or reprint ones which have holes or other imperfections.
This model requires a crazy amount of filament, and a solid week of printing.
You're not going to be insane enough to print this monster. But here's what I did: Print all the parts. Assemble and glue. Paint with an ABS + acetone mixture to give a more uniform surface and more strength.
The "wires" are made of black quarter-inch tube, available at any hardware store.