If you are looking for the actual packs that inspired such mods, the latest K4 System offers:
Allows for carrying meat or heavy gear between the bag and the frame. If you are looking for the actual packs
Built with custom carbon fiber stays for vertical rigidity and torsional flexibility. If you are looking for the actual packs
Standard version 1.2 includes stability patches to prevent game crashes when equipping the backpack alongside other heavy armor sets like the Exoskeleton. If you are looking for the actual packs
Adjusts the maximum carry weight to a more realistic or "unlocked" value (often 80kg to 100kg+), allowing players to haul more loot without becoming encumbered.
Utilizes 500d Cordura for a balance of durability and water resistance.