It looks like the Afghan army is going to M-16s. I have my serious doubts about relatively primitive troops in a relatively primative army being able to maintain the weapon.

from: http://www.strategypage.com/htmw/htw.../20071124.aspx

The Afghan Army is replacing its AK-47s for M-16s. The first 5,000 M-16s arrive in January, and 10,000 a month after that, until 50,000 have arrived. The Afghan army currently has a strength of about 50,000, and this is expected to reach 64,000 in the next 14 months. While the AK-47 is more reliable when dirty, the M-16 is more accurate, a bit lighter and sounds different than the AK-47. That last item is important in combat, as it helps you sort out who is where. Around the world, rebels and irregulars tend to choose the M-16 over AK-47, if they have a choice. This despite all the criticism the M-16 gets. The AK-47 also has its quirks. But since the AK-47 has been so romanticized in the West, those flaws tend to be played down. Not so in the field.