What brevity term means no ordnance remaining?

The brevity term that means no ordnance remaining is "Winchester." This term is widely used in military communications to indicate that the unit or aircraft has expended all of its ammunition or ordnance. It is a quick and efficient way to convey this critical status to command and control entities or to coordinating units.

The use of brevity terms, such as "Winchester," facilitates clear and concise communication during operations where time and clarity are vital. In this case, when a unit reports "Winchester," it allows other operators or command staff to be aware that they cannot engage in further fire missions without resupply.

Other terms listed, like "Remington," "Rifle," and "Browning," do not carry the same meaning as "Winchester" and serve different purposes or are not standard brevity terms recognized for indicating the absence of ordnance. Thus, "Winchester" is the correct choice because it effectively communicates the critical operational status of having no munitions left.