What have I bought!?

[Gunnerboy]

So sorry pictures refuse to upload on here and i cant figure out why... But anyways got a blackpowder shotgun today that is percussion style it uses a trapdoor springfield lock trigger and stock with this semi crude looking barrel in 20ga with a brass bead at the end. Only mark i can find on the barrel is captial C stamped on the right side of the barrel .. Any ideas on the make of this piece? My thoughts are a bannerman conversion of some type.

 

[Scooter22]

Really need pics. There were alot of conversions done with these. Some safe and many not. I woudn't shoot it until you know what you got.