Early one saturday morning I was leaving my house with my padded AR-15 case to go shooting. Due to limited parking, I had parked a *little* too close to a stop sign, and lo-and-behold a cop is writing me a ticket.
He sees me walking up with this gun case, and asks "Is this your car?". "Yes", I say. He looks down at my AR-15 case, and asks what I have in there. A few moments later he's inspecting a colt 7.62x39 AR-15, the caliber apparantly blowing his mind.
"Do you have one of those full-auto kits in this", he asks, sniffing the air for a confiscation. "No, that's illegal, anyways if I did it would be a registered Class III weapon."
"Wait here," he says. He takes my rifle back to his car. Great, now I'm gonna get hassled and be late for rifle practice. I look up and see he's walking back with his AR-15. After displaying his Armalite with enthusiasm, we talk about the pro's and cons of the .223 vs 7.62x39, as he had learned in the service. He put the half-written ticket in his pocket, and let me go on my way!
For anyone looking for a good "free state" to live in, Southern Nevada has been good to me. As long as you aren't pointing your AR at a cop, you're good to go.