The government owns the factory. They are converting to 6.5.
Their factory, their rules.
There are plenty of sources of 5.56 ammo out there.
Hopefully, other facilities will ramp up. But I still suspect that the underlying motive is to control US, not where that particular ammo goes.
I don’t have an AR, but if I bought one it would be 7.62x39 or .300 Blackout. Not long range, but very effective.
For long range I have .308 and 30-06 bolt action rifles. And some heavier.
So speaks the expert on ammo and the economics of ammo when 1/3 of the supply is cut off. Idiot.