US Army Considers Adopting an Interim Battle Rifle in 7.62NATO: eventually adopt 6.5

[stanc]

If we're sticking with metallic cartridges, I don't want to get rid of 5.56 NATO. I really wish we had the 5.45x39 case to work with using .224 or 6mm projectiles out of it. That would allow more BC to be realized due to the amount of ogive length available.

Have DMs shooting Grendel, and a 6.5mm Lightweight LMG that is belt-fed.

But, I wonder if anyone will ever build a belt-fed Grendel LMG...