Which is a key characteristic of the M252 mortar system?

The M252 mortar system is recognized primarily for its towed configuration, which allows it to be easily transported and deployed by infantry units. As a towed mortar, it can be set up quickly in various types of terrain, making it highly versatile for support in combat situations. The ability to tow the system enhances mobility, enabling it to be relocated as needed on the battlefield without requiring a dedicated vehicle or self-propulsion mechanism.

While the other characteristics may describe different weapons or systems (like being lightweight or shoulder-fired), they do not specifically pertain to the M252 mortar. For instance, self-propelled systems are typically equipped with onboard propulsion, and shoulder-fired systems are designed for individual use, which does not apply to the M252's operational capabilities. The lightweight aspect, while relevant in a general context, is not the defining feature that distinguishes the M252 from other mortar systems, such as the towed characteristic that emphasizes its practicality and operational use in the field.