The lightsaber of Jedi apprentice Ben Solo before his fall to the dark side. There wasn't a crystal clear visual in The Last Jedi but this derived from what we got!
Obviously much like Kylo Ren's saber this is with more of the overall form in mind rather than how it would be broken apart to paint because the finish is somewhat uniform.
I printed the lower and upper chamber and clamp with supports generated in Cura. All of the STLs are in the orientation I printed them.