Advancing UK Aerospace, Defence, Security & Space Solutions Worldwide
  • Home
  • /
  • Defence
  • /
  • BAE Systems to upgrade Mk 45s for US Navy

Defence

BAE Systems to upgrade Mk 45s for US Navy

The US Navy has awarded BAE Systems over $70 million to upgrade Mk 45 five inch naval gun systems and ancillary equipment.

Above: The Mk 45 is the lightest, most compact five inch (127mm) fully automatic naval gun in the world, built to integrate precision guided munitions with minimal gun modifications to ensure the US Navy and their allies, have the advanced firepower they need.
Courtesy BAE Systems / US Navy Photo

On 30th September, BAE Systems received a $23.5 million modification to a $47 million contract awarded at the end of July, bringing the total value to over $70 million. Under the contract, BAE Systems will upgrade and overhaul existing systems to the Mk 45 Mod 4 configuration.
 
The upgrade to the Mk 45 Mod 4 configuration includes a 62-calibre barrel and a mechanically strengthened gun mount. It also features a fully digital control system that easily integrates targeting and fire control data. Together, these upgrades allow the use of modernised munitions with 50% greater firing energy and prepare for future precision-guided munitions with unprecedented ranges.
 
Brent Butcher, vice president of Weapon Systems at BAE Systems, said: "Events in the Red Sea this year have underscored the importance of firepower aboard US Navy ships.

Advertisement
Security & Policing Rectangle

“Equipped with the latest configuration of the Mk45 gun system, the men and women in the Navy have the capabilities to protect themselves at sea. We continue our commitment to providing the latest naval gun technology, including advanced munitions, to US Sailors and their allies.”
 
Upgrades and overhauls to the Mk 45 are a cost-effective solution to ensure that US Navy Sailors have the modern long-range strike and air defence capability that they require, ensuring peak performance from a deep magazine of advanced five inch projectiles that are easily replenished at-sea. By upgrading these platforms, Sailors will receive the latest innovative technology that will support advanced munitions and future mission capabilities at a lower cost than a new gun system.
 
Work on the contract will take place at the BAE Systems production facility in Louisville, Kentucky and will be completed by the end of 2028.

Advertisement
Cranfield University
Ajax reaches IOC milestone

Defence

Ajax reaches IOC milestone

7 November 2025

The Ajax armoured fighting vehicle for the British Army has declared Initial Operating Capability (IOC), a key delivery milestone that means it can now deploy a squadron on operations.

BAE Systems and Turkish Aerospace to collaborate on UAS development

Defence

BAE Systems and Turkish Aerospace to collaborate on UAS development

7 November 2025

BAE Systems and Turkish Aerospace signed a Memorandum of Understanding (MoU) yesterday, to establish a strategic alliance to explore opportunities to collaborate on the development of uncrewed air systems (UAS).

Boeing to display range of defence solutions at Dubai Airshow

Defence Security Events

Boeing to display range of defence solutions at Dubai Airshow

7 November 2025

Boeing will be bringing its defence and services solutions to the Dubai Airshow later this month, with the F-15 Eagle, the CH-47 Chinook, KC-46 Pegasus, AH-64 Apache and the C-17 Globemaster on static display.

BMT and Teledyne Marine to advance maritime autonomy programmes

Defence Security

BMT and Teledyne Marine to advance maritime autonomy programmes

6 November 2025

BMT has signed a Memorandum of Understanding (MoU) with The Teledyne Marine Vehicles group which includes Iceland-based Teledyne Gavia and North Falmouth, MA based Teledyne Webb Research, laying the foundation for strategic alignment and close collaboration on future projects in the maritime autonomy space.

Advertisement
ODU RT
BAE Systems’ CCMCS approved by USAF

Defence

BAE Systems’ CCMCS approved by USAF

6 November 2025

BAE Systems’ Compass Call Mission Crew Simulator (CCMCS) for the EA-37B electronic attack mission system has been approved for training by the US Air Force (USAF) and delivered to support interim fielding.

Recent events highlight need for more resilient UK space systems

Defence Space

Recent events highlight need for more resilient UK space systems

6 November 2025

At the Global MilSatCom conference in London today, Nik Smith, Director of Space at Lockheed Martin UK, told delegates that the UK should accelerate investment in sovereign, resilient space systems to safeguard national security and drive economic growth.

Advertisement
Tritax 300x250