The cocking hook is just hung up.
First try closing the gun and than dry firing it. Then try opening it. If it Unhooks then you are there. If not, then you have to do surgery to get the barrels off. Either way the unhooking issue will have to be corrected. It could be a couple different things causing it.
I can help you with most any parts you may need if you want to contact me.
Personally this gun, even at a grade 3, would be a labor of love and would not be financially beneficial. The main question is what condition the barrels are in. If the bores have pitting, I would not try to bring it back.
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B. Dudley
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