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.
go to the milsurp forum and ask this question. They'll want to know the maker, (should be stamped on the back of the reciever behind the rear sight) the serial number, and they really need pictures to give an estimate. There is a sticky link in the photo gallery forum telling you how to post pictures.