Hearing gunfire isn’t at all uncommon here. I live right on the edge of city limits, and I doubt a day goes by without being able to hear someone shoot if I’m sitting on my back porch. I totally get that it’s a cultural difference, but it’s very common throughout the US. The only exceptions are very dense urban areas, really.

I’ve heard it said that there are two kinds of places in the US, and they’re categorized by what sound makes you worry. In some places, if you hear an emergency vehicle’s siren you ignore it, but get concerned if you hear gunfire. In others, you ignore the sound of gunfire but get concerned if you hear an emergency vehicle. I definitely live in the latter kind of place.