Co2 is stored in your bottle in Liquid form. When you lean your gun forward while playing you typically will get liquid co2 into your gun. Liquid co2 will harm your gun and causes velocity spike which in turn reduces the accuracy of your gun. This expansion chamber will break up any liquid Co2 before it has a chance to get into your gun
This Genuine Tippmann Accesory kit includes everything you need to mount an expansion chamber on your Tippmann A-5. Braided steel hose, expansion chamber and loctite. Even includes easy to follow instructions.