“FreeGunInfo.com is a human edited directory of things related to guns” just launched by the fine folks of The OkayNetwork, which has over 160 directories of cities in the US. They started with LAokay, which now has tens of thousands of entries, and grew from there. They plan for FreeGunInfo to cover all aspects of guns, not just one facet, as do many gun sites. They will continually be adding more entries.
(Disclosure. I sometimes do SEO and link building for them)