An interesting look at the pattern of small arms distribution in the Sudan, and a link to a much more detailed study:
“Iran also reaps a strategic dividend from their ties with Sudan. Their warships have docked at Sudan’s Red Sea ports, and the relationship is a rare instance of Iran building close ties with a Sunni Muslim government, or with a state outside of the Middle East.”
“In return for being an Iranina client, the ever-embattled regime in Khartoum receives crucial Iranian help in setting up and operating its domestic arms capacity. And it gets plenty of weapons, too. The Small Arms Survey sites UN sources that report Iran was responsible for “13 percent of Khartoum’s self-reported arms imports from 2001 to 2012.”
IR Theory & Practice 