Several recently updated reports from the Congressional Research Service, not readily available to the public, provide an introduction to the subject of conventional arms sales and the proliferation of weapons technology (all pdf).
“International Small Arms and Light Weapons Transfers: U.S. Policy,” updated October 2, 2006.
“Military Technology and Conventional Weapons Export Controls: The Wassenaar Arrangement,” updated September 29, 2006.
“Improvised Explosive Devices (IEDs) in Iraq and Afghanistan: Effects and Countermeasures,” updated September 25, 2006.
“Arms Sales: Congressional Review Process,” December 20, 2002.