IHS Jane's reported in December 2014 that Hanwa had completed development of the Chun-Mu LRMRS, which is intended to supplement and eventually replace the Doosan K136 Kooryong 130 mm 36-round unguided rocket system.
The Chun-Mu LRMRS comprises two pods of six 239 mm solid propellant rockets fitted with high-explosive (HE) warheads and a GPS/inertial navigation system (INS).
Whereas the K136 Kooryong is fitted to an unprotected KM809A1 6x6 platform and has a maximum range of 36 km. The Chun-Mu LRMRS has a range of over 80 km and is launched from a Doosan DST 8x8 cross-country platform. This has a protected crew cab, nuclear, biological and chemical (NBC) system, computerised fire-control system (FCS), and position navigation unit (PNU). It also has independent suspension with a central tyre inflation system and run-flat inserts.
The pods are fitted to a launcher with hydraulically powered elevation and traverse on the back of the the Doosan DST 8x8 cross-country platform. A self-loading system (SLS) is carried on a similar 8x8 protected vehicle.
The DTAQ statement added that the system can also fire unguided 227 mm and 130 mm projectiles; versions have been shown at defence exhibition fitted with pods holding 36-round K136 Kooryong 130 mm rockets.
The South Korean-made new multi-caliber K-MLRS Multiple Launch Rocket System during fire testing.