US Navy orders 22 Mk. 38 Mod 4 deck guns in $197M deal

The US Navy installed the new Mk. 38 Mod 4 point-defense system aboard the Arleigh Burke-class destroyer USS Mustin (DDG-89). On October 7, 2026, the service ordered 22 more systems under a three-year $197 million contract. The remotely operated mount pairs a 30mm Mk. 44S cannon with a .50 caliber machine gun.

• The contract for 22 Mk. 38 Mod 4 systems is worth $197 million
• The mount combines a 30mm Mk. 44S cannon and an M3HB .50 caliber machine gun
• It is operated remotely via the combat system or electro-optical sight
• Phalanx CIWS will stay in service until at least 2029