Articles proclaiming this and that are abundant, but I can't see 5.56 being dumped any time soon for general issue. At least not till a good polymer-cased round is selected?? Metal-cased ammo has pretty much run its course and is at an evolutionary dead end. For all the whining done about the 5.56, all of the advantages that encouraged its adoption in the first place still apply and Big Army still knows that. So do its downsides of course.

Since the acquisition rules changes some years ago, various .mil organizations will continue to pick and choose what they like and run with them, with civilian projects glomming on to proclaim "adoption by the military" to help market their product.