It was a replica with lights and sound done by Master Replicas before they went under. It shows up on eBay now and then. Search the board here; lots of people have posted pictures. It was the phaser used in Star Trek V and VI.
Seeing these just remind me of just how close to perfect STIII got to honoring the props from the original. I'd love to get one to display with the STIII Phaser I have.
Here's one I started working on last week. It should have a lid in the next few days or so.
That looks great.
Please tell me you are thinking of doing a run of them.