It's just for looks. I really hate weapon toggling in this engine, so tend to use it very sparingly.
I don't think Aragorn can use the bow, since in other mods such as the Kings of the West his animations were switched to Faramir's so he could actually fire the bow. I believe it is just for looks, but it would be pretty sweet if he could actually use it.
Haha, I'll run another update with real info on some remaining Gondor items in a weekish.
BTW, no details? WTF? You guys are so evil!