Mostly M-1 rifles. At least one officer had a .45 caliber pistol that was assigned to someone back at the Ravenna Armory at the time. Another officer had a .22 caliber pistol that was not Guard-issue.
After years of legal battles over the 1970 Kent State shootings, the families received payments of reparations. In the addition, the use of lethal ammunition by the National Guard became highly restricted.
Kent State Shootings
During the 60s/70s, the "Army" National Guard (there is a Air National Guard also) was utilized primarily in the Dakotas during the Wounded Knee incidents, the Watts riots in LA, Governor Wallace's use of the Alabama Guard to keep blacks (African Americans) out of white schools, and the state of Ohio (Kent State University shootings).
See: Kent State University Shootings
The Ohio National Guard.
some blame the State troopers and some blame the students themselves, no matter what, it was a tragedy.
Kent State University
Kent State, in Ohio.
On May 4, 1970, four students were killed and nine wounded by National Guard troops at Kent State University in Ohio. The students were protesting the invasion of Cambodia, announced by Richard Nixon the week before. Kent State University
Kent state university
Because the cops couldn't handle everybody
Kent State University in Ohio.