The low velocity <a href="https://en.wikipedia.org/wiki/m583A1" class="extiw" title="w:m583A1">m583A1</a> 40mm grenades deploys an illumination flare from a parachute, when fired into the air.
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<a rel="nofollow" class="external free" href="https://asc.army.mil/web/project-type/ar/">https://asc.army.mil/web/project-type/ar/</a>