There's badass prop replicas and then there's these replicas of Deckard's pistol from Blade Runner. To add insult to your silent cry of "Why the hell aren't I rich? I hate my life!" is the all-metal version that has lights and sounds built in. Here's a taste:
There are two sound for the start up, one that sounds like a High Energy Charging system startup and another that is more like a robotic woman's voice saying "Weapon Armed", to change you need to look between the ammo housing and the front of the trigger guard, in there you will find a small slide switch which controls which sound effect is played.
Tip of the iceberg. And too freaking sweet. The man's name is Richard Coyle, and he's got a website where he details the creation of this gun and other prop bits.