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.
It should work just fine. Lows have a 1" center-height from the top of the receiver and the objective diameter of that scope is 2.01". You may be able to get away with extra-lows if you can find them.