Lower Receiver Comparisons

[bo-hoss]

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.

[ssracer]

Here are some shots of my AA lower before I put it together with their parts kit. Mill work and finish are excellent.





Beveled mag well








This is a top down shot of a friend's AA lower next to his Plumb Crazy lower.....he's a little odd...lol