Have Firearms Repair Questions? Ask an Expert
Do you have a parts book for that gun. If so find the part that is call cocking lever. Normally when the barrels are on it it recocks by pushing back on a rod when the gun is broke open to reload it you will need to be VERY careful and find a punch brass if you have one to push the rod back that would normally be done when breaking it open. Look to see what barrel it was on top or bottom. Or did both get fired when barrels not on. I don't know how easy this is for you to understand. When you work on guns all day things like this seen easy.
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I am not sure were you find that link I have never had to have a question answered. I thought the screen that you start on tells all about how the site works and how you get connected to a gunsmith.