Crafting weapons is done in the weapon wheel (
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You'll pop this with absolutely no difficulty at all. If you really want to, you can grab this cheevo early on by crafting arrows. They're the easiest to craft, requiring only 1 x Hardwood, which is available in abundance all over the map. Fill up your pack with Hardwood, then fire off all your arrows. Use the weapon wheel to craft and fill your stock back up, then hunt down some more hardwood.