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.
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You don't attach pics through CGN, you load them on a site like Photobucket and then type in the image code and the pic magically appears. Read this thread carefully. Its really quite simple. http://www.canadiangunnutz.com/forum/showthread.php?t=198167
There's someone here who recently tried to remobe the flash hider on a No5 and didn't like the amount of effort required IIRC. If the barrel was shortened, the best probably would be to leave it in its Bubba'ed state.