Except nowadays even small local police departments have tanks and swat teams.
I find it difficult to imagine an uprising against the 1% in America any time soon, but if it did happen I can absolutely imagine the police siding against the 1%.
I think the chance of the police or military siding against the 1% is incredibly small.
https://s3.amazonaws.com/wfmt-studs-terkel/published/22485.m...
Successful uprisings by the masses against the elites almost always involve substantial fractions of the military, police, and other security services defecting, either abandoning their gear or taking it with them and turning it against the elites.
Until we get robots replacing guys with guns, that's going to be a recurring failure mode for narrow elite rule.