The Multiple Launch Rocket System (MLRS) is a highly mobile automated system on a tracked platform which is operated by a three-member crew. It's an armored, self-propelled, multiple rocket launcher used by different armies in the world.
The M270 vehicle can carry a pair of Rocket Packs Containers (RPCs) holding six 227mm rockets.
According to Lockheed Martin, the M270 can fire surface-to-surface 12 Guided MLRS or Extended Range (ER) GMLRS rockets, four Precision Strike Missiles (PrSM) or two Army Tactical Missile System (ATACMS) within a span of 60 seconds and hit targets as far away as 80 km.
It's also possible for the launcher mount to also be capable of holding a rocket pod containing a greater number of smaller calibre rockets. Each pack could take 54 ea rockets 70mm (2.75”) in a 9x6 array.
Since the first M270s were delivered to the U.S. Army in 1983, the MLRS has been adopted by several NATO countries.