GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: jusanothajoe on April 01, 2018, 01:49:07 PM
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The O-ring on the end cap of my XS-60 keeps swelling up ? I am only getting one use out of them.
Bought several different ones.
(https://i.imgur.com/1zL4D9T.jpg)
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Common Buna-N should not swell on exposure to CO2 but if in doubt, go with polyurethane.