What type of ammo handling system stores rounds in a serpentine trackway inside a large outer container?

The type of ammo handling system that stores rounds in a serpentine trackway inside a large outer container is known as a linear link-less system. This system is designed to facilitate the loading and feeding of ammunition without the use of mechanical links, allowing for a more compact and efficient storage solution.

The serpentine trackway configuration enables the rounds to be stored in a manner that minimizes wasted space and maximizes the volume of ammunition that can be held within the container. As ammunition is needed for firing, it can be fed directly from this trackway to the weapon system in a controlled manner, ensuring reliability and ease of access.

This system contrasts with the other options, such as link-fed systems, which rely on linked ammunition that can be bulkier and less efficient in terms of storage space. Chain-driven and drum magazines represent different types of ammunition feeding mechanisms that do not utilize the serpentine trackway configuration. Thus, the characteristics and advantages of a linear link-less ammo handling system make it the correct choice in this context.