I was there for 4 1/2 months and you wouldn't believe the stuff the skinnies mounted on technicals. M-2 .50 cals, Soviet 12.7mm (but mainly ma deuces), recoiless rifles, the cannon pods off the nose of MIG-17's or MIG-19's, (actually saw one of these near Baidoa) and Soviet rocket pods (like the ones you see on Hinds and Hips). The Somali military was supplied at one time or another by both the US and the former Soviet Union. They also took 14.5, 16, and 23mm anti-aircraft guns (ZPU's) and mounted them on flatbeds. Use your imagination and think road warrior.
BTW, the term technical came about in the early stages of JTF Provide Relief when the various aid organizatons (ICRC, etc..) needed protection for there food and supply shipments from the various clans who would steal them. These aid organizations didn't have authorized funding for guards or "muscle" to protect the shipments and warehouses, so they created a "technical" fund. They used the money from this technical fund to hire clansmen for protection. That's where the term came from.