Does the Challenger Bullpup Big 9 also have the problem with the broken valve? Until now the gun is perfect, accurate at 100 meters and megapowerfull and no problem at all.
I don't have the Challenger but I have a Terminator and two HP rifles. The valve on the Terminator is larger and has held up 2 years so far with no problem. I would suggest a back up JIC. Where the poppet breaks on the HP rifles is right where the hardened shaft ends inside the plastic valve. I and other members here have made our own out of PEEK which is a robust plastic compared to what OEM's are. I would not purchase an OEM valve for HP rifles I would look at the improved valves from Ebay. I not having a Challenger will let a member who has a Challenger add to that.