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 own both the 452 and 455 .... the later is just as good although it lacks the superior tangent sight. From a week ago, over open sights at 50 yards, those target rings resembled the size of a toonie and my vision is no longer at its best......Win Round Nose Copper Plated ammo is all I had to test with at the time.