Phase II of the Army's Individual Carbine Competition began in May 2012. Five contenders moved on from Phase I for the rights to succeed the M4 as the Army's standard issue carbine. Those 5 rifles are:
Ultimately, if no rifle proves superior to the M4, the Army plans to forge ahead with the currrently designed M4 with assorted upgrades (most likely to include a piston system, the keystone of the Colt APC).
The evaluation process will take some time; we may possibly have a winner sometime in 2013.
Be safe and have a good day.