I just received a Pedersoli Harpers Ferry percussion pistol from DGW. The manual had absolutely no information pertaining to this pistol. I'm trying to take the barrel off to clean off the grease. I took out the wedge, the tang screw, and the ramrod housing. I still can't remove the barrel. Does the pin in the forearm need to be driven out? The review I just read said nothing about driving out the pin. I'd appreciate any help. Thanks