First of all, might composite bows were listed with the alchemical items in 3.0, iirc. Basically, you can apply your strength bonus, up to +x, to your damage rolls with the bow, in your case, up to +1 (str 12).
I'd have to see the bow's entry to be sure, but as I recall it had a +1 enhancement and any arrow fired from it benefitted from true strike. I also recall it being one of the most overpowered and broken items ever printed. Really, there's a lot of stuff in Sword and Fist that's just ridiculous.
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