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.
I've done some peening with my USGI sights in the past. I've even glass'ed in the rear sight aperture with Devcon and lots of release agent.
If you are shooting in competition (you likely have upgraded to NM sights) then it's worth doing said mods. If you are hunting and it's your bear gitter/ truck gun, then save yourself the time and expense. Leave things alone.... hey, it's a bear gun!