Which best describes the AT-4?

The AT-4 is best described as a lightweight, man-portable anti-armor weapon. This designation highlights its primary function and design characteristics. The AT-4 is a shoulder-fired anti-tank weapon that is used by infantry for engaging armored vehicles and fortifications. Its compact size allows for easy transport by individual soldiers, making it an effective tool for anti-armor operations in a variety of combat scenarios.

The weapon's design emphasizes portability and simplicity, allowing soldiers to quickly deploy it in the field without extensive support equipment. Additionally, the AT-4 is equipped with a single use, disposable launcher which further enhances its ease of use for troops on the ground.

In contrast, choices referring to a multi-launcher system, a long-range sniper system, or a stationary artillery piece do not accurately capture the purpose or functionality of the AT-4, as it does not serve these roles in military operations. This clear definition and understanding of the AT-4's characteristics and intended use set it apart as a specialized anti-armor solution for infantry forces.