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Towed artillery remains an important source of battlefield firepower, but modern counter-battery sensors and drones have made staying in one firing position increasingly dangerous. A gun that must be connected to a separate vehicle before it can relocate may have less time to escape after firing, creating demand for artillery that combines heavy 155mm firepower with greater tactical mobility.
The U.S. Army has selected the K9 Mobile Howitzer (K9MH) for prototype testing under its Mobile Tactical Cannon (MTC) program. Hanwha Defense USA will initially provide six systems, with an option for another 12, under a contract reportedly worth up to $262.9 million.
The program is evaluating mature wheeled 155mm artillery systems as potential replacements for the M777 towed howitzer in some formations. Unlike the M777, the K9MH carries its weapon on its own vehicle, allowing the crew to move between firing positions without relying on a separate prime mover to tow the cannon.
The new howitzer adapts technology from the established K9 self-propelled howitzer family but replaces the standard tracked chassis with a Tatra Force 8×8 wheeled platform. The change is intended to combine the family’s artillery technology with the road mobility and deployment characteristics of a wheeled vehicle.
According to Interesting Engineering, mobility is particularly important for so-called shoot-and-scoot operations. Once artillery fires, enemy sensors may calculate its location and direct counter-fire toward that position. A self-propelled system can potentially leave more quickly than a towed gun that must first be prepared for movement and attached to another vehicle.
Firepower remains central to the requirement. The program calls for a 155mm cannon, with the Army’s solicitation specifying systems in the 49- to 56-caliber range. In artillery terminology, caliber in this context describes barrel length relative to bore diameter; longer barrels can help generate greater projectile velocity and range. The Army is separately developing ammunition and propulsion technologies intended to extend future artillery reach.
The prototype competition will assess more than firing performance. Evaluation criteria include integration, delivery schedules, production costs, supply-chain resilience and the ability to transition manufacturing into the United States.
To support that requirement, an integration and testing facility has already been established in Alabama for the program. The broader family also provides an existing manufacturing and operational foundation, with more than 2,500 systems reportedly fielded worldwide.
The current contract does not mean it has been selected for full production. The six initial vehicles will undergo Army testing before a decision on follow-on procurement is made.
Still, the program illustrates how artillery requirements are changing. Heavy firepower remains essential, but on a battlefield increasingly watched by drones and precision sensors, how quickly a gun can move after firing may matter almost as much as how far it can shoot.
