Tippmann Expansion Kit for Platinum Series. Expansion chambers work great with paintball guns using CO2. They fight inconsistency in velocity by giving the liquid CO2 extra space to expand into the gas form. This kit contains the parts you need to install the Tippmann expansion chamber onto your 98 Custom Platinum Series paintball gun. The complete kit includes expansion chamber, gasline, gasline fitting, intake, Loctite thread sealant, and complete installation instructions.