There are no firearms in the world of Dying Light 2 because it's a world where civilization is destroyed and nobody knows how to create professional firearms anymore.
There are ranged weapons instead, such as: bows, crossbows and a handmade shotgun, which tends to break quite often, though.
But are you going to maybe add guns in the future?
We understand that this is one of the top 3 requests from our community. And we have stated many times that we want the Dying Light franchise's development to follow our great players' expectations. There is nothing more I can say at this point, as I don't want to jump the gun, pun intended. - Tymon Smektała [Dying Light Franchise Director]