While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
Note: This feature may not be available in some browsers.
That one was not done at the time, the rear had not been drilled or tapped for the buffer tube yet, not other work finished.
All I had was the jig and a drill press.
Its not something you want to do on a drill press.
One of our locals took the rest of them to a machine shop in town - and they ran off 4 much quicker and much more precise.