Ran into the guy that makes the tank chair and he had his home defense system. It has a dual 10/22 gatlin gun set up but he has barrels up to 50 cal and a 308. SUPER COOL in person! Here are some pics... By the way, this guy makes all sorts of wheelchairs for folks. He is building one for a guy that is ex LEO. It will have red and blues etc. I am not selling anything so I hope it is ok to post the website. www.tankchair.net . I am not affiliated with the guy at all.