Niether of the hammers cock? Did you put the cocking slide back in? :-) Is the cocking hook properly engaging the bellcrank?
One thing you can do since you have it back apart is to put everything back together, just without the stock. The only part missing would be the safety jacket. In this situation, the gun can be opened and cocked and dry fired to test operation. And then if something is amiss, you can see what is going on. If all parts are in correctly and the sear springs are putting proper tension on the sears, then the gun should cock and stay cocked.
Getting the safety slide engaged with the arm is tricky some times, I usually pu the button forward and also make sure that the arm is forward and they usually go together, but sometimes they take trial and error. The whole safety jacket assembly is one of my few complaints with the Parker mechanism design. I much more prefer the fox style of safety from a standpoint of simplicity and also in stock fitting.
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B. Dudley
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