Originally Posted by
Raygun
Be a bit awkward testing the AA cylinders after 10 years, or any time period.
They deform if overfilled and would not take the test pressure. What other manufacturers test to I don't know. If all cylinders are tested (not just samples) I can't recall seeing any stampings for any manufacturer. Some cylinders do have it etched on but would that be good enough ?
Do the "Bottle" rifles have tested/stamped bottles ?
ATB
Ray
Sports match did hydraulic pressure testing of the GC2's cylinders and I think they still have the equipment at their works,probably taken to 1.5 x working pressure. Mine had a ultra sonic/radio isotope check as did a batch in the 90's.Besides their tubes are built like tanks 
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HERX77 .
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