I was there at Ft Benning 13 years ago when they were testing the General Dynamics LWMMG (338NM). I actually got to fire it. All these years later they still haven’t made a decision. This is just a rehash of old ideas they never made a move on.
Their new 6.8 cartridge is an update of .276 Pedersen from the mid 1920s. This is how government works, it's all about the process without results.