US Marines put out a RFI(Request For Information) for M27 IAR. USMC has been experimenting with M27 last year and this move seems to indicate having more of M27 available for infantry troops. It will not be enough for every single infantry, but could be replacing M249 or work as a DMR.
The RFI doesn't say H&K M27, but the requirement is that of the gun. Should any of other manufacturers meet the requirement, this could go in to an interesting direction.
You can read more from SSD
From: Soldier Systems Daily