Winchester 1000s won't cock

Or that little squarish extension on the anti bear trap/cocking lever came out of the piston. where it goes through that oval shaped hole in the action tube? The break barrels won't cock, and barrel will stay loose if this connection isn't made. Cock the barrel a bit to get a little slack, push the extension into the hole, and close the barrel. Reassemble to stock and it should now function normally.

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