Forgings vary in width a few thousandths on the outside dimensions. It is not uncommon to see “deep” and “shallow” engravings in a production run of receivers,The different depths are reflecting the variances in the forgings.
The SA&A looks like the newer “strengthened” forgings from Cerro…
“the shape of the void adjacent to the selector holes. The SA&A has a distinct bulge machined in. This does not seem to be a high-shelf/low-shelf issue. Any ideas on the function of these two shapes?”
It will be interseting to see if anybody knows the function.
