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 tried contacting glock for more info, I know you have contact Colt and Remington for services such as this. I know the number for glock to find this out with 1-770-432-1202, I read it on another forum, here is a link I found but you letters don't match their decoder