You stand a real chance of bending the exhaust valve if you shoot the pressure down to empty it. I'm not familiar with the specific model, but assume it's one of the many rebranded FX 2000 family. The exhaust stems are around 3mm to begin with, and this is further grooved for an oring gland. New one...

Hello all. Registered for the old forum, but it's been nearly two years waiting for it to be restored, and I'm questioning whether that will happen? Longtime airgunner from the western US, and got my second AA a few years back. More on that later.