This caliber seems to be broadening it's horizons:

"The prototype FN MK 48 Mod 2 6.5CM features the latest upgrades for FN’s series of light and medium machine guns, including an adjustable stock for length of pull and cheek height; improved, locking charging handle; improved, double-notched sear; improved handguard with 3-, 6- and 9-o’clock positions with improved bipod; and, more robust feed tray latch, ensuring the feed tray cover locks into place during reloads. Once development is complete, existing MK 48 Mod 1 models can be configured at the armorer level to the Mod 2 variant or newest caliber with the addition of the upgrade kit and barrel conversion."

https://fnamerica.com/press-releases...ic-conference/