Tell us what happens when you cock the gun and pull the trigger. Does it -
1. Fire but nothing comes out? No rapport, nothing? Do you now have a pellet stuck in your barrel
2. not even cock? Or it does cock but pulling the trigger does nothing, like it doesn’t release the sear?
I know you said no air comes out. I just want to hear the details.
by chance is your valve knob threaded in all the way against the trigger block?
what about the barrel? You didn’t touch the barrel at all? I only ask as I’ve heard of the detent ball inside the rear block breaking and if your barrel was inserted and spun so the transfer ports didn’t line up(because the detent ball thst catches the indexing notch broke) then you would not get air flowing into the barrel.