Most recently, here in Los Angeles, the National Guard has their M4 rifles and they were issued ammunition for their rifles. I had many conversations with them at various locations and their answers were all the same. They were to observe and report any suspicious or criminal activity, but they were not to engage civilians. They were not equipped with any less than lethal force options including batons. They only had their rifles. To a man (and a few women) was they all understood that if they opened fire with their M4s on a crowd over a property crime, i.e. looting or vandalism, they were done. People have short memories, but back in 1970, National Guardsmen opened fire on student protestors killing four of them and wounding nine others. The outrage from that shooting changed history and makes the current unrest look like a picnic.