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  1. J

    o-ring replacement benjamin marauder .177

    Trying to replace the 4 1763-026 o-rings that go inside the pressure tube - 1 on the valve assembly, 2 on the gauge port assembly, and 1 on the fill adapter assembly - I keep chewing up the o-rings on the threads at the end of the pressure tube, where the fill adapter screws in. Especially the...