This is the Klingon phaser from Star Trek IV The Voyage Home. If you remember the movie, Chekov is caught with it on the nuclear wessel. The FBI agent who's interrogating him, not realizing it's a disruptor, leaves it within Chekov's reach. When Chekov grabs it and attempts to stun the FBI agent, the phaser fails.
"Must be the radiation, " he says. This has a heavy metal core.
I designed this from the ground up, modeling it after screenshots and technical drawings by the set designers. I have worked to keep it as close to canon as possible. Because I built it around a metal core, it...