M1991 MRLS has 22 launching tubes and fires the same 240-mm rockets as the M-1985 MRLS. The rockets launcher system is mounted at the rear of the truck chassis just behind the crew cab. The M-1991 rocket pack is easily identified as it has 2 rows of 8 tubes and 1 row of 6 tubes. It has various warhead capabilities, including HE-FRAG, smoke, incendiary and chemical. A standard HE-FRAG warhead weights 90 kg and contains 45 kg of explosives. Before firing, four stabilizers are lowered to the ground; these are positioned one either side at the rear, and one at the left and right of the vehicle A claimed maximum range of fire is 43 km. The maximum range is 30 km, and now 60 km for the new version Juche 100.