Which nomenclature corresponds to the 120mm bipod?

The nomenclature that corresponds to the 120mm bipod is M191. This designation is specifically assigned to the bipod used with the 120mm mortar system, which allows for enhanced stability and accuracy when firing. The naming conventions in military equipment often reflect design modifications, compatibility, and operational specifics, and M191 accurately fits within this context as the specific model for the bipod in question.

The other options do not refer to the 120mm bipod and might represent different components or systems within military nomenclature but are not tied to the 120mm mortar's bipod functionality. Understanding these designations helps in identifying and utilizing the correct equipment during operations and training.