These were probably meant for Antifa/BLM use. The same thing is going on in Portland.
I wonder if Antifa will have a use for scoped rifles - like they are going to ramp things up and actually target people. The one rifle in the picture with the long stainless steel barrel looks like it would actually be useful at a long range.
Those are two groups the FBI would protect. Antifa is the spoiled brat offspring of white liberal 'elites' and BLM was the creation of the FBI's 60 Agent visit to Ferguson - the visit that started the war on Cops...