The original model takes the mod Half life zombie edition
Though, the fifth head was taken from the default svencoop model
The textures with another skin color were taken from the default svencoop model, but, i edit it on paint.net to fit the new model
The animations are of the svencoop model, It should be noted that they are different from those of valve / gearbox
Sorry for the unclear screenshots, I struggled to find a map with different grunts, Also I can't insert the cheats in the svencoop for some reason. If someone gives me a hand with some screenshots I would appreciate them. I also apologize for the lack of credits
If you think something can be improved let me know
I'm pretty sure none of this model is mine, and I'm not sure why you put "animations/textures/model" under "unknown" when you took the model from Sven Coop.
As for improvements I'm gonna me honest with you and say this model is a mess. For starters there's a backpack inside the other backpack, pouches clipping into each other, and a par of goggles inside the RPG guy's helmet, UV-map misalignment errors all over the place making the grunts look cross eyed, and the RPG guy's head doesn't match the rest of the model.