This whole thing is a matter of balancing rights, common sense, emotion, and reality.
I'll throw out a few ideas, having been on both sides of such a situation.
Yes, you may have a right to carry an AK on the sidewalk downtown.
No, you don't have a reasonable (I said REASONABLE) expectation of doing so without police contact.
How that contact progresses and concludes depends on a number of things, which include the professionalism of the officers, the time & place, and your own demeanor.
Many years ago when I was 19, I was living in a relatively small town outside an airbase in Idaho & happened to be between cars at the moment. I had bought a .22 rifle, walked to where I picked it up from the guy selling it, and walked back home carrying it.
Broad daylight, walking along a main street, I was not waving the gun around & did not look like a threatening type.
I was stopped by an officer who briefly and professionally checked me out, found I was very cooperative, listened to my explanation, and left after about a three minute chat.
I understood & wasn't bothered in the least.
Years later, when I was working as a cop in the second largest city in my state, calls started to come in from alarmed citizens about a scraggly looking guy carrying a broadsword slung over his shoulder.
On such incidents, two cars were automatically dispatched, I was one. We found the guy, walking down the sidewalk with his sword slung.
We talked to him, he wasn't particularly friendly but wasn't belligerent and did follow instructions not to put his hands anywhere near the blade while we were there, and did provide ID. No warrants, no indications from any of the complainants that he had ever had the blade in hand or behaved in a threatening manner, and he appeared to us to not be a threat to anyone, based on his cooperative demeanor & lack of witnesses to the contrary.
After less then ten minutes of talking & running him for wants, we were all on our way.
He continued to generate citizen calls for two or three weeks, all required a response, those who dealt with him more than once just showed up, talked briefly to determine no dangerous activity was involved, and he eventually disappeared.
As a matter of individual right, yes, you can walk down the sidewalk with a weapon openly displayed if your laws permit it.
But, as a matter of reality, in today's environment where the news media plays incessantly on every nut who runs on a rampage and kills a dozen people, the citizenry at large is very nervous at the sight of a gun.
The sight of a handgun, much less obvious, is one thing. The sight of what the majority of non-gunnies see as a fullblown assault rifle is pretty much guarranteed to result in a police response.
Something most people don't realise is that once Man With A Gun phonecalls start coming in, the dispatcher has no choice but to assign a response. He or she can't make the determination to "no-case" it, or clear it out on his or her own authority without followup. One or more cars MUST be dispatched. It could be anything from a kid with a BB gun to the beginning of an armed bank robbery.
Once dispatched, the responding cars can't refuse the assignment on their own authority, for the same reasons, plus a legal liability that attaches if they clear the call without responding & somebody gets killed.
On arrival, officers have a wide area of latitude and discretion in handling the situation, but they do have to make contact, however brief, and make a determination regarding the necessity for any further action. If none, everybody goes their own way.
Time wasted for all concerned, but that's just the reality of modern life.
Situational context does make a difference.
Guy carrying an AK on the downtown sidewalk of the capitol city of ANY open carry state at any time of day is an automatic police response to citizen calls. Count on it.
Guy carrying a hunting rifle to a neighbor's house in the back streets of Smalltown America probably isn't.
Guy carrying an AK from the gunshow to his car several blocks away will probably not generate a call to police.
Guy carrying an AK down the street at 3 AM probably will.
I view this as more of a common sense issue than a personal liberty issue.
Under the Constitution you have the right to walk into a biker bar and loudly yell "Anybody who rides a Harley is a sissy!"
Doing so just to assert that right is idiotic, and almost certainly quite painful.
It's unfortunate that society has become so fearful of those who display a gun, but again- it's the reality.
Even when not dispatched, in today's climate of fear (which is too often fueled by incidents of multiple deaths by deranged individuals) most cops WILL stop to check out somebody they encounter in a public place with something as beyond-the-norm as a rifle.
Society on the whole demands order, police are mandated to maintain it, and while YOU may know you're a perfectly innocent good guy just going for a walk and coincidentally excercising your right to open carry, the public doesn't know that, and the police don't know that. Not without stopping to have a little chat.
We can go on all day about asserting open carry rights.
But, those who insist they should be able to tote any weapon they want publicly anytime & anywhere they want without any type of "hassle" by police are not living in the real world.
As for the "slippery slope" thing, view it from the angle of John Q. I-Ain't-Got-A-Gun Citizen. Pit bulls occasionally make the local news when one runs amok & injures somebody, but neither they nor baseball bats make days and weeks of national news headlines for killing ten people in one endlessly publicized incident.
In the mind of the public, it's GUNS that kill, in the hands of a psychotic individual. It's GUNS that hit banks and convenience stores, not pit bulls or bats.
A hundred years ago, the sight of a gun was much less of a panic-inducer than it is today.
Even in much of rural America it's not that big a deal.
In downtown Bigtown, it is.
Don't blame the police for over-reacting, blame those who shoot up schools and political gatherings for creating a societal environment where the open display of firearms, particularly of a militaristic type in an urban setting where such things are way beyond the norm, is so forcefully associated with death and injury.
Walk your dog past somebody who doesn't like dogs, and as long as the dog behaves itself the cops don't get called. Dogs are a normal part of society in public places.
Carry a bat to the bookstore or grocery store, and you may get a few raised eyebrows, but if you present no appearance of intent to brain anybody with it, the cops probably won't get called.
Sling an AK over your shoulder & go for a burger at McDonalds and see what happens.
It's public mind conditioning.
People see "Man With Gun Kills Eight At Crowded Mall!" on the 10 o'clock news.
They do not see "Man With Gun Saves 30 When Crowded Bus Runs Off Bridge Into River!"
It's necessary to get past the emotion. You may be perfectly within your right in your locale to carry openly, but the practical matter is that you have no reasonable expectation of not drawing police attention if you choose to do so.
Right or wrong, as Stumpy said after playing with his pet crocodile (which he had a perfect legal right to do), that's just the way things go.
Denis