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Gbb fill valve orings, yes or no??

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  • Gbb fill valve orings, yes or no??

    How thinks its better to have these? I've just got a we glock and the we mags that have the oring don't accept much gas, my mag that doesn't have an oring you can see the propane pushing the air out of the mag and when propane starts coming out you know it's full.

    Sent from my SM-G935F using Tapatalk

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