Next up is the slide stop. The one on this example appears to be unmarked. It is painted in the same black paint found on MAS rifles up until just after the war:
Note that the axle is polished for smooth function.
Other than the red painted "Fire" indicator on the slide, the only other paint present is on the mechanism support, but only part of it. Although I'm only showing the left side of it, the entire mechanism support is phosphated:
However, the back of it is painted black. I've shown it below in the frame so as to illustrate the contrast between the paint and the phosphate:
Here is the rear of the mechanism support after removal from the frame:
The only mark on it is an "L" on the upper left side, shown below from two angles:
The bottom face of the hammer is marked with an "R":
