A new study published by the UN Office on Drugs and Crime, that has been co-authored by Nicholas Marsh of PRIO, is based upon information reported by 48 countries covering the years 2010-2013 and provides the most extensive available picture of trafficking in firearms, and their parts and ammunition. Previous research has tended to be case studies that provide in-depth information on one location, but not an overview of the wider picture.
Read more in this blogpost by Nic Marsh.