Trying to figure out if it's a movie prop or from a video game, or.... It was posted on FB, but the person who posted didnt list a source for the photo.
Aaaahh...Whatever it is, unless it fires a blast of something that can incinerate a Tiger tank with one shot a conventional cartridge revolver is a whole lot more practical and easier to conceal. That's something these sci-fi weapons designers seem to overlook. Sure it looks cool, but who wants to lug it around?