US Army Receives First Korean-Built K9MH Howitzer, Eyes M777 Replacement

The U.S. Army has taken delivery of the first prototype of the Mobile Tactical Cannon (K9MH), a wheeled 155 mm howitzer built by South Korea’s Hanwha Defense USA. Army officials confirmed the delivery at a briefing on October 8, ahead of the AUSA 2026 (Association of the United States Army) annual meeting in Washington. The system is intended to replace the towed M777 howitzer, which has been in service since 2005.

Brig. Gen. Robert “RJ” Mikesh Jr., the Army’s portfolio management executive for offensive fires, confirmed the milestone, saying: “We’re excited to have that and get ready to test it.” Mikesh added that the program deliberately avoided a clean-sheet design: “In this case, we were not going after a clean-sheet design; we were looking for mature and available technologies.” The prototype was also displayed at an Army Modernization Day event on Capitol Hill earlier this month.

A $263 million prototyping deal

Hanwha signed an Other Transaction Authority (OTA) agreement with the Army in August 2026. The four-year deal is worth $100.3 million for an initial six prototypes, with a ceiling of nearly $262.9 million if the Army exercises options for up to 18 systems in total. The agreement calls for accelerated delivery of the first six units, with options for a dozen more. Officials note the prototype arrived less than a year after the original solicitation was issued, a pace they describe as faster than typical for a new combat platform.

Roughly double the M777’s range

The K9MH is a wheeled, eight-by-eight variant of the tracked K9 howitzer, which has served in the South Korean Army since 1999. It mounts a 52-caliber 155 mm gun and, according to Defense News, can reach ranges beyond 60 kilometers. By contrast, the M777’s standard range stays under 24 kilometers, extending to about 40 kilometers with Excalibur guided rounds. That gap lines up with the Army’s FY2027 budget target of a 70-kilometer fires capability, and the program is being framed as part of the Army’s broader 155mm Artillery Propulsion Modernization effort to close that range deficit through new propellant and charge technology, rather than as a one-off platform swap.

The prototype will undergo a series of operational experiments with active-duty soldiers under near-combat conditions. The Army plans to field the cannon first to Stryker Brigade Combat Teams, then to Mobile and Infantry Brigade Combat Teams. Hanwha is also pursuing a tracked variant under a separate solicitation published in late August, and the company is building an integration and test site in Opelika, Alabama, to complement production in South Korea.

A first for Korea’s defense industry

The delivery marks the first time a South Korean defense company has won a complete U.S. weapon system program rather than a subcomponent contract. The K9 family has been in Korean service since 1999 and is now fielded or ordered by more than ten countries, accounting for more than half of all self-propelled howitzers in service worldwide. Entry into the U.S. Army inventory extends that footprint to the world’s largest defense budget.

What it means for Turkish artillery exports

The milestone also sets a benchmark relevant to Türkiye’s MKE-built Fırtına family, which competes with the K9 in the same self-propelled howitzer export category. The K9 line already holds roughly 60% of the global market for this class of system, against two decades of more limited export reach for Fırtına. Hanwha winning a foothold inside the U.S. Army, not just in third-country export tenders, strengthens the K9’s reference base and could sharpen competition in future tenders where Turkish systems are also bidding.

What comes next

The next phase centers on field testing the six prototypes and collecting soldier feedback. The Army’s stated goal is a fielded system by 2031, though no decision on full-rate production has been made; if approved, the first production lot would total roughly 480 vehicles. Industry observers note the award guarantees only a prototyping phase, not eventual service entry.

Sources

• Defense News, “US Army gets first mobile cannon to replace M777 howitzer, officials say,” Oct 12, 2026 — delivery confirmation, contract value and Mikesh quotes. https://www.defensenews.com/land/2026/10/12/us-army-gets-first-mobile-cannon-to-replace-m777-howitzer-officials-say/
• TWZ, “South Korea’s highly mobile 155mm artillery system wins U.S. Army howitzer contract” — platform specifications and range comparison. https://www.twz.com/land/south-koreas-highly-mobile-155mm-artillery-system-wins-u-s-army-howitzer-contract
• The Korea Times, “US Army receives 1st Hanwha-made mobile howitzer system: report,” Oct 13, 2026 — significance for South Korea’s defense industry. https://www.koreatimes.co.kr/southkorea/defense/20261013/us-army-receives-1st-hanwha-made-mobile-howitzer-system-report
• Defence Blog, “U.S. Army takes delivery of first Korean-built wheeled howitzer” — corroborating source. https://defence-blog.com/u-s-army-takes-delivery-of-first-korean-built-wheeled-howitzer/