On August 18, 2026, the U.S. Army awarded Hanwha Defense USA a $100.3 million firm-fixed-price contract under the Mobile Tactical Cannon program to deliver prototype K9 Mobile Howitzers for rigorous testing and soldier experimentation. This agreement, carrying a total cumulative ceiling value of $262.9 million, initiates a competitive four-year evaluation phase to assess whether the wheeled artillery system can potentially replace M777 towed howitzers in select U.S. military formations.
U.S. Army Contract and Rapid Prototyping Phase
The contract awarded to Hanwha Defense USA—the American subsidiary of South Korea’s Hanwha Aerospace—covers the initial delivery of six prototype K9 Mobile Howitzers (K9MH), with options for the U.S. military to order 12 additional units, forming a potential evaluation fleet of 18 systems. Army leadership will use this data to determine future serial production decisions rather than implementing an immediate fleet-wide replacement.
Design and Automated Turret Integration
The K9MH differs substantially from the tracked K9A1 and upcoming K9A2 systems used by the South Korean military. Instead of tracks, the K9MH pairs a K9A2-derived automated turret with an 8×8 wheeled chassis manufactured by the Czech company Tatra. The automated ammunition loading system uses separate projectile and charge conveyors to handle heavy components, reducing the required operating crew from five positions down to three personnel.
The baseline weapon system features a 52-caliber CN98 155 mm cannon compliant with the Joint Ballistics Memorandum of Understanding standard. During live-fire demonstrations in April 2026, the platform fired nine rounds in 59 seconds. The system’s 40-round magazine and mobility features are designed to satisfy military demands for rapid repositioning after firing to avoid counter-battery fire.
Competition in the Mobile Tactical Cannon Program
The K9MH enters the U.S. Army evaluation pipeline alongside several competing international platforms designed to modernize mobile artillery. The South Korean-derived system faces competition from Elbit America’s Sigma, BAE Systems’ Archer, the American Rheinmetall and KNDS partnership offering the RCH 155, and a Leonardo DRS and KNDS Caesar proposal. While this marks the first time a South Korean defense company has secured a U.S. military program involving a complete native weapons system prototype, final fielding remains dependent on data gathered throughout the four-year soldier experimentation phase.