Flechette rounds are a type of grenade available for grenade launchers in Modern Combat 4: Zero Hour.
Modern Combat 4: Zero Hour Edit
|40mm rounds||Sticky grenades||D‑HEDP grenades||Flechette rounds|
Flechette rounds are rounds that can be equipped to both grenade launchers in Modern Combat 4: Zero Hour: the 40mm Thor GLP and the Kolbászky S-40 GL. They have a delay between hitting an object and exploding. Flechette rounds are more streamlined than other grenade launcher rounds, so they can fly further, and faster.