jalapeno

I was given a Sheridan XTS Series gun to fix up, i can have it if i can fix it. It seems like it is missing a few parts in the bolt section. I was wondering if there is a list/picture of parts for this type of gun?

It looks sort of like a Tippmann 98 Custom so i've been looking at the parts of that gun to figure out whats wrong.

Basicly when you cock the gun, the bolt, it stuck at the back and you have to take the trigger frame off to release the bolt. It won't decock. It's missing a 'Rear bolt insert', 'drive spring', and 'drive spring guild pin' by looking at the tippmann's parts...

Any suggestions on how to go and fix this gun?