FX Revolution help

[PanicSteve]

So, after an otherwise normal round of shooting, I pick my Revo up off the bench, and these pieces fall out of the back of it. There's an allen screw in the end of the brass piece, but with the spring re-installed, there doesn't seem to be anything to thread the brass piece into. Exploded diagrams are eluding me for this rifle, anybody have a quick tip, or is it time to send it in for professional help?

 

[TKA87]

Did it come out of the back of the breech? If so then it looks like your hammer and spring. A lot of gun will do that over time if your not paying attention, the hammer spring adjuster screw will back out over time from small vibrations and bumps and then your hammer and spring come flying out.