During the MLK riots in 1968, the Illinois National Guard put troops in the middle of the riot areas. They were assigned to stand under street corner lights with empty M-16’s and look tough. I would not expect much different today if the ILNG is deployed into the city.
I was "Regular Army" and I remember taking riot training at Fort Bliss in 1967. We were never deployed so, I don't know if they would have issued ammo or not.. But, the Guard sure got some at Kent State.! That pretty much ended the hippy movement.....I think.