The system is designed to defeat single and group, stationary and moving, armoured and soft-skinned targets and engineer facilities by firing 120mm smoothbore and rifled mortars.

Gran kills stationary and moving targets by the first shot without fire adjustment. Targets located at a considerable distance from each other (up to 300 m) are killed at a single fire angle and without changing settings in the projectile.

Simultaneous fire by several mortars at several targets (without hampering each other's operation), a capability of firing with incomplete meteorological data, defeat of targets moving in defiles, located behind high crests or on reserve slopes of the terrain, and high-accuracy fire at night significantly enhance mortar effectiveness, especially in irregular terrain where the application of guns is complicated.

Gran system mobility is provided by specially designed portable automated fire control system that ensures round-the-clock targets detection and designation in hard-to-reach areas, topographical survey and orientation of fire position and command-observation post, automated computation and input of fire settings.

The analysis of Gran's combat efficiency shows that, featuring high capabilities and modest demand for resources and ammunition, it can ensure a high target kill level in conditions where conventional mortars and guns are actually ineffective.

The system comprises:

• a 120mm guided HEF mortar projectile;
• a propelling charge;
• Malakhit automatic fire control system (FCS) comprising:
  — laser designator-ranger (LDR) with a thermal imager
  — commander’s panel
  — communication means kit