O L D Single Shot

[Guest Jennings382]

Maybe an old Stevens or something? It's a 12ga though and I know nearly everything about it except who made it. Oh and there's a piece that goes into a hole in front of the hammer on the left side of the receiver. Is it to lube the gun up or what??? All I know is that every time I fire the thing it shoots the piece partially out or halfway across the room. What is this piece and the hole??????????!?!?!?!?!?!?!? And what model is this shotgun, who makes it? Oh and I put the piece on the receiver so anyone can clearly see it.

[Guest david_g17]

the "piece" isn't made out of lead, is it?