M9 fragmentation grenade (Earth-7149)

The M9 High-Explosive Dual-Purpose grenade (M9 HE-DP) is the standard-issue hand grenade. Like most weapons in the armament industry, the M9 is manufactured en masse by the Armat Battlefield Systems.

Design details
HE-DP stands for High-Explosive Dual-Purpose. This designation means that it is designed to be effective against infantry and lightly armored vehicles. AP designates "anti-personnel", indicating the weapon's intended use.

The grenade has a hard metal casing, with a frangible design meant to break apart into small, regular shards. This surface creates consistent, reliable fragmentation patterns for the grenade, rather than randomly rupturing along metallurgical faults. The grid-shaped casing houses a charge of ComL high-explosive fitted with a mechanical primer. When the charge detonates, it shatters the grenade's casing, sending shrapnel flying away at high velocity.

Trivia

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