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.
The sideways left red dot looks wrong, but the dot is about the same height as a bead, so I can aim with a cheek weld, which I can't do with the iron sights.
Edit: If you want to go totally ghetto, you can attach a laser pointer or flashlight with 2 hose clamps, 2 nuts and bolts, and a popsicle stick. Some bicycle inner tube to prevent scratching the finish.