Hi I'm Sean
Yes it is, that is what they are there for. It's also a cops job to prevent crime hence patrols (even though their effectiveness has been proven to be somewhat ineffective) and proactive police work. When someone is open carrying an AR and they commit a crime then what are you (maybe not you personally) going to say about it? The police should have been doing their job and preventing criminals from comitting crimes.I've been pretty harsh on the open carry guys on here in the past, but should someone get guns drawn on them and detained for carrying a gun over their shoulder? I'd have to go with no.
It's not the job of the police to be security officers all day. If a crime is committed, it's a cops job to investigate it. If a criminal(key word) is loose, it's their job to arrest him. Some dude walking down the street with a gun isn't inherently committing a crime or being a criminal, regardless of your personal beliefs on carrying.