I am trying to think of what could be going on there given what is behind that area mechanically. That being the hammer/sear engagement. IF there is a function to that, the only thing that makes sense is Lefever’esque trigger pull adjustment. The screw has an offset post on it that allows the sear to engage the hammer notch more or less based on the position the screw is turned to. Thus effecting trigger pull weight.
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B. Dudley
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