OVERVIEW: The Fajr‑5 is an unguided, two‑stage, 333 mm surface‑to‑surface artillery rocket designed by Iran’s Aerospace Industries Organization. The Khaibar‑1 is an exported variant used by non‑state actors.

DETAILS: The base Fajr‑5 is 6.485 m long, weighs ~915 kg, and carries a 175 kg fragmentation warhead containing ~90 kg of high explosive. It has a maximum range of ~75 km in single‑stage form and up to ~180 km in two‑stage configuration. The rocket uses a spin‑stabilized, nine‑nozzle solid‑propellant motor with electric ignition, capable of firing in salvos of four rockets from vehicle‑mounted launchers. Reload involves detaching and crane‑handled tube modules, each containing one rocket, with individual reload time of ~2 minutes per tube.

The two‑stage variant retains the same diameter and warhead but adds a booster stage to extend range. Its extended‐range capability enables strikes on high‑value targets at deep tactical depths. The system remains unguided, relying on ballistic trajectory and sea‑level performance.

Launchers are mounted on 4‑tube MLRS platforms based on Mercedes‑2631 or Isuzu 6×6 trucks. Rockets are fired electrically via crew‑operated console; tubes are reloaded manually using on‑vehicle cranes. Systems can operate in salvo or single‑rocket modes as required.

NOTE:
IOC: 2013
Operators: Iran; Hezbollah and Hamas (as Khaibar‑1)
Platforms: Mercedes-Benz/Isuzu 6×6 4‑tube launcher vehicles
Conflict used in: 2006 Lebanon War (Hezbollah), Syrian Civil War; 2023 Gaza/Israel conflict (by Hamas)

SOURCE: Wikipedia “Fajr‑5”; Naharnet “Fajr 5: Five Times the Range…”; Tasnim IRGC thermobaric warhead report; Press TV IRGC test report