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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Big long bolt in the back side of the stock. You'll have to unscrew the rubber butt pad to expose the hole it's burried in. It takes a flat head or 13 or 14mm socket, if I remember correctly.
Foregrip:
Flat head screw that passes between both sides of the wood. Wiggle free the internal spacers or remove the gas tube.