http://www.thetruthaboutguns.com/2015/04/foghorn/breaking-fnh-usa-releases-new-guns-including-semi-auto-m249-m4-m16/
Apparently they have it at their booth at the NRA show.
https://www.m4carbine.net/showthread.php?167776-Who-s-up-for-the-new-semiauto-m249