Yeah, it's a stunt--note how it has no "recharge ports". It's a tube with some Graflex add-ons on it, not an actual Graflex. Note also the end is painted black--it was probably used for Vader, and might be the saber that ended up being the ESB stunt that the weird bolts were added to (that ended up being the ROTJ Vader stunt).
Note also the end is painted black--it was probably used for Vader, and might be the saber that ended up being the ESB stunt that the weird bolts were added to (that ended up being the ROTJ Vader stunt).