From their "about" page:
Here's a dandy listing of info from the Small Arms and Light Weapons (SALW) GuideThe Interactive Guide on Small Arms and Light Weapons is an open access tool, designed to build knowledge on how to identify different types, makes and models of commonly used SALW in organized violence; to collect data on the global and country-specific spread of these SALW; and to describe some of their visual and technical specifications.
The guide is not an exhaustive list of all SALW that are used around the world.
Global SALW control relies on, among other things, data and knowledge of the weapons themselves.
into EWR, UXO, EOD in general? got links to the Unexploded eXplosive Ordnance database too.