KSG Stopped working

[Hyena Airsoft]

Hi, was wondering if anyone here knows what’s wrong with my KSG. Thought the pump had locked but took it apart and that bit is fine. 

I think it’s the trigger which is the issue as when I pull it, it doesn’t fire but the trigger still goes back like normal. 

 

[Hyena Airsoft]

Fixed the KSG now it’s got so many friction held pieces and one part had fallen out and ended up in the trigger bit