I think this is a different series of protests and I don’t think he is not talking about the NFAC group at Stone Mountain.
The NFAC group was said to have many among them carrying paintball guns, and at least one with a real rifle was walking around with an active jam in it visible in photos.
That is correct; the actor group was a much smaller group that was also in Atlanta. The NFAC group was what they appeared to be (e.g. Black Panther style irregular militia).