Which statement best describes the M9 service pistol Weapon Condition Code 4?

Weapon Condition Code 4 for the M9 service pistol is defined as a state where the magazine is loaded, but the chamber is empty, and the slide is locked back. This condition indicates that the weapon is ready to be loaded with a round, but is currently in a safe state to handle, as there is no round in the chamber.

The correct description here accurately captures the specifics of this condition, emphasizing the readiness of the firearm while also ensuring it is safe to operate. It provides a clear understanding of how the M9 is managed when in this state, particularly for safety and operational readiness.

Other options suggest configurations without the required elements for Condition Code 4, such as having a round chambered or the safety engaged, which do not align with the defined characteristics of this weapon condition.