Can't remove the barrels from the action.

[Kensal Rise]

Jeffery:
There can be a couple reasons why the barrels hang up. Few are serious. But for now, do this to see if it works:

1) put the gun completely back together
2) open then close the gun (with snap caps if you have them) to cock the tumblers.
3) push off the safety and pull both triggers to snap down the tumblers.
4) now don't open the gun but remove the forearm and take the gun apart, then see if the barrels come off the action.

MD is not my range, so perhaps others can recco a good Parker 'smith near you. Abe Chaber comes immediately to mind...