|Place of origin||Iran|
|In service||Iranian Army|
|Calibre||120 mm (4.7 in)|
|Effective range||16,000 m (17,000 yd) with rocket assisted projectile|
Razm is an Iranian 120 mm long-range mortar unveiled in 2010 and produced by DIO. This is one of the world's longest range mortars achieving a range of 16 km with rocket-assisted munitions and can be used alongside tube artillery. To achieve this range, Razm uses an unusually long barrel. The overall design of the mortar is similar to that of 120 mm HM 16. Due to its long barrel, the weight of the system is too high to be carried by infantry. Thus it is mounted on Kaviran tactical vehicle, Boragh or other vehicles. While mounted on Kaviran, it can be unpacked in 30 seconds and used immediately.
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