I have said it before, when it comes to FPS games the only way to roll in my opinion is with a mouse and keyboard. I can't play with a gamepad in my hands from an Xbox 360 without flailing about on screen like a noob. I know there are some people out there that are hard-core Xbox 360 gamers and can play with the gamepad with some leet skillz, but I am not one of them. If you are an Xbox 360 gamer that likes FPS and other games where you need to be able to hit many buttons at once, the Avenger might be interesting to you.
The Avenger is a sleeve that grips your own Xbox 360 controllers and puts all sorts of weird levers and stuff on the controller. It looks like the Borg assimilated the thing. According to the company that makes the thing it is designed to increase the manual dexterity and accuracy of the gamer when plying games like Call of Duty and others. The Avenger also claims to improve response time.
Users can activate up to nine buttons at once with the Avenger installed and the thing ships with a stabilizer tripod, tension straps hair triggers, and sensitivity adjusters. It looks really weird and I think it will have a steep learning curve. Considering that it's only a sleeve for your controllers, it is also expensive at about $60. You could buy a new gamepad for that much.