Great article on Military dot com.....looks like its a go that The Marine Corps will replace the M249 Squad Automatic Weapon with the more accurate and reliable M27 Infantry Automatic Rifle.
Link here:
http://www.military.com/news/article/corps-to-replace-saw-with-automatic-rifle.html
Link here:
http://www.military.com/news/article/corps-to-replace-saw-with-automatic-rifle.html