A 40mm grenade is a type of ammunition designed for use in grenade launchers, such as the M203 or the MK19. It has a diameter of 40 millimeters and is typically used by military and law enforcement for various purposes, including anti-personnel and crowd control. The grenades can be equipped with different types of fuses, allowing for various detonation methods, such as impact or timed explosions. These grenades come in various types, including high-explosive, smoke, and illumination rounds. The versatility of the 40mm grenade makes it a valuable tool in combat situations, providing soldiers with options for engaging targets or creating diversions. Their design allows for effective use at a range of distances, enhancing tactical flexibility.