Spock's dagger from the Mirror Mirror episode of Star Trek

I reproduced this dagger in FreeCAD from a drawing a colleague gave me. It was supposedly worn by an evil Spock in the Original series Star Trek episode "Mirror Mirror": http://www.imdb.com/title/tt0708438/
It was meant as a halloween prop and, therefore, it does not come out of the scabbard. If you really wanted a dagger that came out of the scabbard though this could be easily remixed.