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.
Without seeing the rifle firsthand, I can't say. Even if it is, you could spend years looking for a mount & scope then have to pay $800 for them but they still would not match the rifle. You could try to mount a repro scope on it & send some rnds down range but there is no guarantee they would fit.