Golden eagle gas shottie

[Phonesurgeon]

Help guys

GE M8870 shottie, no longer racks, is it worth fixing?
If so what needs changing?

 

[Cannonfodder]

Before you take it apart have a look in where the shell goes. Mine did this and it turned out a bb had gotten into the space above it and was stopping the pump arms from moving back. I fixed it by pushing the pump forward again and said bb fell straight out