I don't know how to contact you so I'm doing it here. I updated the model of the animated gun. Seeing the game I modified the running (the transition between running and walking wasn't great), shooting and reloading.
I also added the pbr textures on the gun
Low poly FPS Pistol Animated - Download Free 3D model by ImageParSeconde (@ImageParSeconde) [baa81ca] (sketchfab.com) Animated FPS Pistol by ImageParSeconde (itch.io)