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 don't think it matters what hand guard you use, but the LSP from M14 is around the same price and Canadian made as well as better availability up here.
The troy rail will work with the blackfeather, have that setup with my m14. Only issue that comes up I find is that I either have to deal with having a chin weld or get some SL8 iron sights. (still looking for the SL8 sights).