Да ещё в Марте отказались. М855А1 провалил испытания в Июле - при высоких температурах пуля в обломе. Как и предпологалось выбрали зелёнку СОСТ.

"Army ammunition officials are on their third attempt at redesigning the Cold War-era M855 5.56mm round by adding a better-performing, lead-free bullet. The service had to halt the M855A1 Lead-Free Slug program in July when the new bullet failed to perform under high temperatures. The setback delayed fielding by nearly a year.

The newest version of the green round is in the live-fire test phase and Army officials said they are confident it will be ready for combat use by June.

The Marine Corps, however, doesn’t share this confidence. The Corps has dropped its plans to field the Army’s M855A1 and approved the new SOST round for Marines to use in Afghanistan. SOST, short for Special Operations Science and Technology, is SOCOM’s enhanced 5.56mm round. It isn’t green, but it is deadlier than the current M855 round and it’s available now, Marine officials say.

The Corps’ decision to purchase about 2 million SOST rounds in September illustrates the growing frustration with the M855’s performance on the modern battlefield."

http://www.thehighroad.org/showthread.php?t=510226