In Soldier of Fortune II: Double Helix, there are several types of fragmentation grenades available to the player.
The M67 only appears if the player equips frag grenades on the outfitting screen.
The F1 is used by all enemies in the Colombia levels, and appears on shelves in Hong Kong.
The L2A2 is only used by the Triads in Hong Kong.
The MDN11 is the primary fragmentation grenade used by Prometheus troops. A few can be picked up in Hong Kong, which proves that there's a link between the Triads and Prometheus.
This grenade is the only fragmentation grenade in multiplayer mode.