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
ODU RT

“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
FIA2026 animated banner
Altus Group expands portfolio with SEHO partnership

Aerospace Defence

Altus Group expands portfolio with SEHO partnership

23 June 2026

Redditch based Altus Group has announced a new partnership with SEHO Systems GmbH, a German manufacturer specialising in wave and selective soldering systems, automation technology as well as THT inspection solutions.

Rotron Aerospace completes Project Brakestop SkyLance trial

Defence

Rotron Aerospace completes Project Brakestop SkyLance trial

23 June 2026

Rotron Aerospace Ltd has completed the successful trial of its SkyLance One Way Effect system under the UK Ministry of Defence's Project Brakestop: a Task Force Kindred funded project.

NP Aerospace to acquire Iten Defense

Defence

NP Aerospace to acquire Iten Defense

23 June 2026

NP Aerospace has signed a definitive agreement to acquire Iten Defense, a US based specialist provider of advanced defence protection solutions, from Edgewater Capital Partners and other minority shareholders.

RAF in Cyprus receive two HC Mk2s

Defence

RAF in Cyprus receive two HC Mk2s

22 June 2026

The Royal Air Force (RAF) in Cyprus has taken delivery of two Airbus H145 Jupiter HC Mk2 helicopters to 84 Squadron.

Advertisement
ODU RT
Zelim appoints John Cumming as Director of International Business Development

Defence

Zelim appoints John Cumming as Director of International Business Development

22 June 2026

Edinburgh based maritime technology company Zelim, has strengthened its leadership team with the appointment of John Cumming as Director of International Business Development.

SEA wins UKDI contract for 2025 AUKUS Maritime Innovation Challenge

Defence

SEA wins UKDI contract for 2025 AUKUS Maritime Innovation Challenge

22 June 2026

SEA has won a funding contract from UK Defence Innovation (UKDI) for the 2025 AUKUS Maritime Innovation Challenge.

Advertisement
ODU RT
Advertisement
General Atomics LB