After playing Dying Light 2 for a bit, you will realize that there are no firearms in this game. However, a little later you can get a Boomstick, but this double-shot shotgun allows you to shoot twice, and then disappears. And the cost of its crafting is too high to consider the item somehow incredibly useful.
In Old Villedore, you can complete the side quest "History Lesson", in which you will learn about the mass shooting in the city and that the military has seized all firearms. We will not describe how it was, but instead we will show a video from our YouTube channel: