Which grenade is specifically designed to inflict personnel casualties and damage to light equipment?

The M67 grenade is specifically designed to cause personnel casualties and damage to light equipment. This hand grenade utilizes a fragmentation design, which means it is equipped to produce lethal shrapnel upon detonation. The intention behind its design is to maximize the effectiveness in combat situations against enemy troops and unarmored vehicles at close range.

The M67 features a spherical body that enhances fragmentation, allowing the explosive charge to send shrapnel in all directions. This design is essential for achieving the primary objective of inflicting maximum damage over an area, effectively reaching enemy personnel and any light equipment in its blast radius.

In contrast, the other grenades listed serve different purposes. The M18 is a color smoke grenade used for signaling and marking, while the M84 is a stun grenade designed to temporarily incapacitate individuals with a loud bang and bright flash, rather than focusing on causing physical casualties. The ANM14 is also a type of smoke grenade, which serves a similar role as the M18. Thus, the M67 stands out clearly due to its purpose of delivering harm to personnel and light equipment.