T9 Won’t Fire

[Cdn_Cuda]

Working on a Tiberius T9 and it won’t fire. Have air and the mag pressurizes in and out but nothing happens when the trigger is pulled. No puff of air or even a leak. Any ideas?

[Cdn_Cuda]

For the sake of closure: I got help in the Ask the Expert section and now have a got the T9 working. Was a mixture of very gummed up internals and maybe the bolt sliding back when re-assembled the marker.