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
ALTEN opens office in Belfast

Aerospace Defence Security Space

ALTEN opens office in Belfast

14 April 2026

ALTEN has announced the opening of its newest UK office in Belfast, marking a significant strategic expansion into Northern Ireland.

Zelim’s ZOE becomes world’s first fully certified MOB system

Defence Security

Zelim’s ZOE becomes world’s first fully certified MOB system

14 April 2026

Edinburgh headquartered maritime safety and security specialist Zelim, today announced that its AI-enabled ZOE man-overboard detection (MOB) system has received official ISO 21195:2020 certification from independent classification body Lloyd’s Register, following successful completion of testing.

Norwegian Armed Forces upgrade simulation capabilities with OneArc’s VBS4

Defence

Norwegian Armed Forces upgrade simulation capabilities with OneArc’s VBS4

14 April 2026

Norwegian Armed Forces have selected an enterprise license upgrade to VBS 4, BAE Systems OneArc’s flagship virtual training and mission rehearsal environment.

Dstl trials AI-powered drones for rapid explosives detection

Defence

Dstl trials AI-powered drones for rapid explosives detection

13 April 2026

The Defence Science and Technology Laboratory (Dstl) has led a major trial on behalf of the British Army, using AI-powered drone technology to identify landmines and explosive ordnance, allowing bomb-disposal experts to conduct their mission faster through rapid detection.

Advertisement
ODU RT
Maritime Multi Link programme reaches Phase 2c milestone

Defence

Maritime Multi Link programme reaches Phase 2c milestone

13 April 2026

Defence Equipment & Support (DE&S), part of the Ministry of Defence’s (MoD) National Armaments Director (NAD) Group, has reached a key milestone in the Maritime Multi Link (MML) programme, achieving the Equipment Delivery Date for Phase 2c, a significant step forward in how Royal Navy ships share critical battlefield information.

NAD fully established as Andy Start retires

Defence

NAD fully established as Andy Start retires

13 April 2026

The National Armaments Director (NAD) Group is marking a year since interim (Deputy) NAD Andy Start established it in March 2025 and who is now retiring after 37 years in defence.

Advertisement
ODU RT
Advertisement
Gulfstream banner