Update your mod to 1.20.2-1.20.4 please.

@ShrikerChestTree look at the branches, there is a 1.20.1 version
https://github.com/elidhan/Simple-Animated-Guns/tree/1.20.1

The minimum fabric loader is 0.14 so it should work fine on 1.20.4

@ShrikerChestTree look at the branches, there is a 1.20.1 version https://github.com/elidhan/Simple-Animated-Guns/tree/1.20.1

This version does not support 1.20.2-1.20.4...