What is the casualty radius of a M203 40 mm HE round?

The casualty radius of an M203 40 mm high explosive (HE) round is indeed about 5 meters. This means that within this radius, there is a high likelihood of causing serious injury or fatalities to personnel due to the explosion of the round. Understanding the casualty radius is crucial for situational awareness and planning when employing this type of munition, as it helps soldiers to avoid friendly fire and to assess the safe distances for both themselves and civilians in the area. The other options propose larger casualty radii, but they are not accurate representations of the actual effective range of the M203 HE round. This knowledge is essential when operating in combat scenarios to maintain effectiveness and safety for all units involved.