Are troops using faulty weapons?

Insurgents...so I guess these weren't terrorists?

"When the battle in the small village of Wanat ended, nine U.S. soldiers lay dead and 27 more were wounded. A detailed study of the attack by a military historian found that weapons failed repeatedly at a "critical moment" during the firefight on July 13, 2008, putting the outnumbered American troops at risk of being overrun by nearly 200 insurgents."