Which of the following qualifies as residue?

Residue in the context of ammunition and munitions refers to any leftover materials following the use or handling of ammunition. This encompasses a variety of items, including:

• Amt residue only, which indicates materials leftover from ammunition that could still pose a safety or operational concern.
• Unexpended rounds, which are ammunition rounds that were not used during an operation or training but may still be part of the inventory and require appropriate handling or disposal.
• Spent cartridges, which are the casing remnants after ammunition has been fired and are often considered waste material.

Each of these categories of items is relevant in the discussion of residue because they involve handling, storage, and the potential need for turn-in to ensure safety and compliance with regulations. Therefore, when considering the collective nature of what qualifies as residue, it is clear that all listed items meet the definition, thus validating the selection that includes all of these components. This understanding of residue is essential for proper inventory management and adherence to safety protocols within military operations.