Hope it works out for ya. Just did the same thing with a completely froze up and rusted M1 carbine that was given to me. Bought a gallon of PB Blaster and went to work. It was far from perfect when done, but it sure was rewarding. And you can't beat the price. One thing that really helped with the parts that were small enough was to empty the media in my brass tumbler then fill it with the oil and let it shake for a while. Works wonders. Good luck with yours.