The Morini rear sight assembly if fully stripped and of the pistol.
To help assembly use a good quality wheel bearing grease, slightly sticky to both lube and help keep parts in place during assembly.
1/ Place spring inside the Elevation screw.
2/ Locate both ball bearings in Elevation screw with a little grease.
3/ Insert screw into sight body and allow balls to indent into notchs.
You may need to press and turn screw to help the balls seat in place.
If you rotate the screw now you should hear and feel the clicks.
4/ Hold screw in place fully inserted and turn body over, clip the E clip onto elevation screw.
This retains the elevation screw and body as a assembly.
5/ Mount pistol in a horizontal position firmly to mount sight.
6/ Place the elevation spring into location hole with a little grease. also insert side spring and ball into body.
7/ Align the sight body above the pistol and spring (hold level), gently compress while turning the rear sight screw 1-2 turns to start thread.
Side ball should now be compressed and retained.
8/ Keep pressure on sight body to keep level and turn rear sight screw down to bottom (do not overtighten).
The sight should now be seated into pistol frame enough to insert the front pivot pin.
9/ Once inserted assembly is complete. Test elevation movement and clicks.