What type of round is the M816?

The M816 round is classified as an illumination round specifically designed to provide light for night operations. It utilizes an infrared (IR) component that enhances visibility for troops using night vision equipment. This capability is crucial in combat situations where maintaining situational awareness during darkness can significantly impact operational effectiveness.

Illumination rounds like the M816 are intended to illuminate the battlefield without the explosive impact typical of high explosive rounds. They serve a dual purpose by providing crucial light as well as assistance for surveillance and target acquisition. The specific designation of the M816 as an illumination round emphasizes its tactical role, separating it from other types of munitions such as high explosive rounds, smoke rounds, and training rounds that serve different functions in a military context.