Crow-Feather,
I am well aware of the checkered performance history of the M16's when first issued in VN. I was in-theatre during that conflict too. However, that was more than 35 years ago, and the M16A2 and M4 series as they are issued now are WORLDS apart in reliability and function.
As for reliability in sand and dust conditions, NO weapon is designed to be completely reliable when you deliberately pour a fistful of sand into it's open mechanism. That includes all the weapons in the Russian/Soviet small arms inventory (AKM, RPK, RPD, etc) and the US/NATO inventory.
The troops in Iraq and Afghaistan HAVE learned that they need to keep their weapons in a state of readiness, and that includes daily inspections and cleaning. Tha harsh operating environment places heavy preventive maintenance demands on soldiers AND equipment. Whether that equipment is standard small arms or truck and tank engines, or electronic warefare systems, all need effective PM.
I've been involved in extensive small arms reliability testing, and contrary to the popular notion of AK superiority, the current US/Canadian service rifle is among the very BEST.
As an aside, the Iraeli Defense Forces offically use the 5.56 Galil, a modified Kalashnikov design. However, have you noticed the vast numbers of M16/AR-15 rifles carried and used by the IDF in the news? That is NOT becasue the US |Government gives away M16 rifles to foreign allies, but because the IDF considers the M16 to be reliable in sand and desert combat conditions.
John