Instructions
How to Set Your XBox Controller to Rapid Fire
Obtain a modified Xbox 360 controller a specialized controller website like Evil Controller. Purchase a controller that will work with the console and game in use. This feature is available on many first person shooter games but not many other games so check the lists online to find compatibility.
Enter live multiplayer mode as normal.
Activate the rapid fire feature by executing the correct key combination on the controller. This information may come with a custom controller when it is ordered or it may be found online where the controller where ordered from. Some controllers have a button on the backside of the controller that toggle the rapid fire option on and off.