.22? Several of my high school classmates and I road down a main arterial street, in the state's second largest city (then about 125,000, now more like 175,000, IIRC) , if a somewhat older part of it, with 12 and 20 gauge shotguns accross the handlebars of our bicycles. We were on our way to do a little pheasant hunting, just outside of town. No one even tooted their horn at us. :)
Some years earlier I was talked to by a police officer on foot patrol in our little business district. He wanted to know where I was going with that BB gun, and what I planned to do with it. I told him I was headed to my Great Uncle's place just accross the highway, which I was. He said, fine, be careful, and have fun.