A Neapolitan miquelet pistol

[Philip]

Originally Posted by corrado26

I added photos which show the hole in which I stuck a screwdriver to show that the hole is going through. I do not know for which purpose this has been made and can see no sense in it, sorry.

This hole looks like it held a crosspin that retains the tenon that projects from the rear portion of the priming pan cover plate / bridle. This tenon fits into a corresponding hole or mortise in the lockplate, and the perpendicular crosspin helps anchor it. As Fernando correctly points out, this tenon cannot be a threaded bolt because there is no way that the plate/bridle can be rotated into place under the pan.

Whether this pin, for this particular application, can be regarded as a fiel in light of the rather precise definition of same in old texts is a subject for another post. However, at this point we can be clear that the mounting of the priming pan bridle / cover plate is a separate issue from the frizzen pivot (mounted just ahead of the pan).