It looks like Tippmann’s discontinued their expansion chamber kit for the 98 series guns (non platinum). We’re all out too so that’s the end of that. The A5 Expansion Chamber kit is still available. We do have some other expansion chambers that will work just fine on your gun. You just need to make sure you have the right fitting and braided line to install it. Feel free to call us for help.
Just to be clear. That discontinued item is for the NON-Platinum Series 98 Customs. If you have a 98 Custom Platinum or PS then you’re still good to go. The Platinum Series Vertical Expansion Chamber is still available.