You are looking at an unbuilt Star Trek TOS Phaser 1. This kit was made available by John Long several years ago. He made 2800 of these and this is number 324. The box was sealed but I opened it to take photos for this auction. This is really for someone a little advanced in model building skills. However there are highly skilled fans out there that can be commissioned to build it for you. 
John had access to a screen used prop to design this after. It is designed to have a light glow out of the tip when the site is raised.