Test
How the heck are they going to test them if they do. Do they take them off the gun and manufacture a plug to screw into the end. Also what pressure do they take them up to? i know the AA cylinders are weakened at the threads so this part opens before the cylinder splits. I have read of a few lads putting too much air in and this happening. it does not take much over the test pressure.
I think you are just supposed to buy new.
Nitemax what are you going to do about yours to save your hands?
When I die don't let my wife sell my guns for what she thinks I gave for them!!!