Piled up behind them are ammunition boxes, covered in Chinese symbols -- it's impossible to know exactly where the bullets in the boxes came from but they offer a glimpse of the complex and circuitous routes of the global arms trade.
United Nations investigators have found most of the small arms fueling the conflict in Sudan's western Darfur are Chinese despite an arms ban on a region where tens of thousands have been killed and 2.5 million squat in squalid camps.
"China has been, and continues to be, a major supplier of light weapons to the government of Sudan and many of the neighboring states," said Ernst Jan Hogendoorn, one of four U.N. experts on a panel which recommended 17 players in the Darfur conflict be sanctioned for obstructing peace.
The panel's report found Sudan's neighbors Chad, Libya and Eritrea had supplied weapons to Darfur but most of the small arms and ammunition in the region were Chinese.
"Chinese arms and ammunition are relatively cheap compared to other suppliers, said Hogendoorn. "Some also argue that China asks fewer questions."
He said they found no evidence China was defying the embargo and supplying arms directly to Darfur. But weapons they had sold to Khartoum were likely to end up there.
China says it takes a responsible attitude toward military exports, rejecting accusations in an Amnesty International report this month that it was selling arms to an array of human rights abusers, including Sudan and Myanmar.