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.
Have you adjusted the trigger to make the pull lighter? You may have adjusted it so far that the sear is no longer holding the bolt notch. Also, check the screw tension on the trigger group, if they loosen up, it will drift away from engagement.