What is the filler composition of the M-67 Fragmentation Grenade?

The M-67 Fragmentation Grenade contains a filler composition of 6.5 ounces of Composition B. Composition B is a type of explosive that consists of a mixture of RDX and TNT, making it a more stable and powerful explosive option, suitable for military applications. This composition allows the grenade to achieve an effective blast radius while also producing lethal fragments that can injure enemies within that range. The design and materials used in the M-67 are specifically tailored to maximize lethality and effectiveness in combat situations, which is essential for its intended use as a hand-thrown grenade. The other options listed do not accurately reflect the recognized specification for the M-67, thus emphasizing the importance of recognizing the correct filler composition for this type of grenade.