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
General Atomics LB
Milanion and RPAL expand Indonesian Navy USV programme

Defence Events

Milanion and RPAL expand Indonesian Navy USV programme

19 June 2026

At Eurosatory 2026 in Paris this week, Milanion Group and PT Republik Palindo Internasional (RPAL) agreed a significant expansion of their unmanned surface vessel (USV) programme for the Indonesian Navy, signing a new collaboration agreement that builds on a live contract already in implementation.

ADS appoints Matthew Reynolds as CIO

Aerospace Defence Security Space Events

ADS appoints Matthew Reynolds as CIO

19 June 2026

ADS Group - parent organisation of trade association ADS and Farnborough International - has appointed Matthew Reynolds as its Chief Information Officer (CIO).

Leonardo awarded critical aircraft spares NAD contract

Defence

Leonardo awarded critical aircraft spares NAD contract

19 June 2026

The National Armaments Director (NAD) Group has awarded a £27 million contract to Leonardo (UK) Ltd to supply critical aircraft consumable spares across the UK’s entire fixed-wing and rotary-wing fleet.

New training targets installed at Holbeach

Defence

New training targets installed at Holbeach

18 June 2026

Two new repurposed marine vessel targets have been successfully delivered and installed at Holbeach Air Weapons Range (AWR), to enhance Defence training.

Advertisement
ODU RT
Serco and StaplesVR partner on immersive training for NZDF

Defence

Serco and StaplesVR partner on immersive training for NZDF

18 June 2026

Serco New Zealand recently formalised a Memorandum of Understanding (MoU) with StaplesVR, bringing together immersive technology and operational training expertise to support the future training capabilities of the New Zealand Defence Force (NZDF).

BAE Systems awarded US Army M109A7 Paladin contract

Defence

BAE Systems awarded US Army M109A7 Paladin contract

17 June 2026

BAE Systems has received a contract award valued at $535 million to produce additional M109A7 Paladin Self-Propelled Howitzers and M992A3 Ammunition Carriers for the US Army.

Advertisement
ODU RT
Advertisement
General Atomics LB