New BM-21 MARS Grad increase combat effectiveness of old Soviet-made BM-21 122mm MLRS 10206164.

The old Soviet-made BM-21 was based on old Ural or ZIL 6x6 truck chassis, the new BM-21 MARS "Grad" is based on a new 6x6 Kamaz truck chassis to offer more mobility in all types of terrain. The crew cabin is fitted with an armour kit to provide protection against firing of small arms 7.62mm caliber.

The BM-21 MARS "Grad" can use old types of rockets of BM-21 but it can also fire new guided missile with a maximum range of 40 km (the BM-21 has a maximum range of 20 km) and offering more accuracy. This new MLRS can be ready to fire in less than 35 seconds and can leave its firing position in 20 sec.

As the old BM-21, the BM-21 MARS is equipped with a bank of 40 launch tubes 122 mm arranged in a rectangular shape that can be turned away from the crew cabin. The rocket tube arrangement is a single rectangular bank of four layers each with 10 tubes.

The old BM-21 has a crew of 5 while the new BM-21 has a crew of 3. All the firing operations can be performed from inside the crew cabin. Standard equipment includes automatic aiming system, navigation system "Tuspal", navigation satellite system (GPS) Glonas and modern communication system with data transfer by wire or radio.