The Soviet F1 Hand Grenade it's based on the French F1 Grenade. Due to it's shape, it's nicknamed little-lemon. The F1 Grenades only appears in Medal of Honor: Allied Assault: Spearhead and Breakthrough. It's the standard frag grenade for the Soviet troops.
Medal of Honor: Allied Assault: Spearhead and Breakthrough.Edit
The F1 grenade is only available in the last mission as one of the few starting weapons. The F1 in-game functions as any other frag grenade. The amount the player has is limited and there is no way to replenish them. In Breakthrough it returns but only in the Multiplayer as a standard issued grenade for the Soviet characters.
F1 Grenade in Medal of Honor: Allied Assault: Spearhead/Breakthrough.