The RM-70 is a multiple rocket launcher of Czechoslovak origin. It was developed in the late 1960's to replace the old RM-51. The RM-70 uses the same 122mm rockets as used in the Soviet BM-21, which is the world's most common rocket artillery system. Although it is not as cheap and light as the BM-21 the RM-70 is seen as a more capable with its armor, second ammunition load and better off road performance.

The RM-70 is based on the Tatra T-813 8x8 heavy duty military truck and is fitted with an armored cab and the same 40 round 122mm rocket launcher as used on the Soviet BM-21 Grad. Between the armored cab and the launcher a second load of 40 missiles is stored which can be reloaded much faster than on the BM-21. The later RM-70/85 uses the T-815 chassis and has no armored cab.

The RM-70 fires the same spin stabalized 122mm rockets as used in the Soviet BM-21 Grad. A variety of warheads is available, including various Czechoslovak versions. The standard rockets have a range of 20 km and longer range rockets have been developed. The 40 rockets can be ripple fired in 20 seconds. The time in and out of action is 2.5 and 3 minutes respectively.

The original RM-70 features an armored steel cab that protects the crew from small arms fire and shell splinters. In order to fire at least one crew member must exit the vehicle. An NBC system is fitted, also on the RM-70/85 that has a standard truck cab.

The original RM-70 is based on the proven T-813 heavy off road truck. The later RM-70/85 uses the newer T-815 chassis. The 8x8 chassis provides good mobility both on road and off road. The maximum road speed is 75 km/h for the RM-70 and 85 km/h for the RM-70/85.

The RM-70 was widely used in Eastern Europe during the Cold War era. After the Cold War war large quantities became surplus and exports increased. The RM-70 is used all over the world including in Eastern Europe, Africa, the Middle East, Asia and South America.