There's already the Wookiee bowcaster, which works as a crossbow. I think for a bow and arrow you have to edit the bowcaster model to remove the "blaster" part, but keeping the bow. Then edit the bow a little bit, and then make arrows come from it, like what SS did for his rocket launcher. Unfortunately, I can't do this.
The funniest thing about this sentence is that by the time you realize it doesn't say anything it's too late to stop reading it.
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