Thanks Joe. After allowing Kroil to soak in for few days the pin in the knuckle moves freely and operates normally compared to my other Parker. Barrels are still stuck. They rotate normally and cock normally. Gun is dirty and will get the strip and clean as soon as I get the barrels off. Any further suggestions? BTW it is a DH that weighs 6 3/4 lbs. and fits me well. Gun is well worn but original except for a wood refinish.