SCAR-L: ScarL by AdamKokrito, https://poly.pizza/m/ab1V8RlPDc — CC BY 3.0 https://creativecommons.org/licenses/by/3.0/. Adapted by Operation Steel Tide.
MP5A5 and M24: Operation Steel Tide weapon collection, underlying CC0 meshes by nisu, taradavies and Quaternius. Shotgun by Harry_L, CC BY, https://sketchfab.com/models/53b158b0d5a54b4491b09d1fb3058e29 via Mugen87/dive. Models positioned and scaled for EGGLAB.
Gatling/Mini Gun by Tech Knight, CC0, https://opengameart.org/content/gatlingmini-gun. Converted from Blender to GLB.
Firearm sounds and foley: The Free Firearm Sound Library, CC0, https://github.com/buddingmonkey/FreeFirearmsSFXLibrary. Footsteps: Kenney, CC0.
Distribution source for firearm meshes and samples: https://github.com/cktang88/3d-fps

Zombie growl: Monster snarls, CC0, https://opengameart.org/content/monster-snarls