ThinkGeek is selling a miniature replica Portal 2 gun, complete with Aperture Labs-inspired sounds and lighting effects.
The $59.99 replica, which will ship in December, is a foot long and weighs less than a pound. A three-way switch lets you change the colors of the lights and the gun's sound effects from blue to orange to off. The device runs on three AA batteries and comes with a display stand and posable front claws.
You can check out the officially-licensed replica in the video above and purchase it at ThinkGeek. While you're there, you can also check out ThinkGeek's full-sized Aperture Science Handheld Portal Device and complete your transformation with the Chell jumpsuit.