Originally Posted by Frontier_Bill
To his defense, most of the hardware store o-rings wont stand up to paintball use, try putting one on a tank, they explode or shatter.
Actually, yes they will. The orings the hardware stores carry are 70 durometer Buna-N which is what most OEM parts use.
Tank orings, espically when used with CO2, should be at least 90 durometer Buna-N and you're not likely to find those at the hardware store. Polyurethane orings are best in that application as it's a much stronger material.