who assisted iran with its 122mm mrl production?

Iran’s 122mm multiple rocket launcher production has generally been linked to foreign assistance from North Korean and Russian entities , with broader missile cooperation also associated with Chinese support in some reporting.

What the reporting suggests

• North Korea is often cited as an early and important partner in helping Iran develop rocket and missile capabilities.

• Russian entities have also been reported as a source of key assistance in Iran’s missile program.

• Some recent reporting highlights Chinese support to Iran’s ballistic missile effort, though that is usually described in terms of propellant chemicals rather than 122mm launcher production specifically.

Caution

Public reporting on this topic is often broad and sometimes mixes rocket artillery , mortars , and ballistic missiles , so the exact answer depends on which system a source is referring to.