General Atomics

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.

“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.

Related

ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS Charity Cycle Ride group photo
ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS members are taking on a five-stage, 350-mile charity cycle from Belfast to Bristol, raising money for three causes while connecting colleagues and showcasing industry along the route.
London Stansted Airport enjoys its busiest month ever
Stansted
London Stansted Airport enjoys its busiest month ever
Last month Stansted Airport beat its previous monthly record, setting a new all time high of over 3.1 million passengers.
Aerospace

11 Aug 2026

Doncaster Sheffield Airport reopening: What needs to happen before flights return
Doncaster Sheffield Robin Hood Airport building exterior
Doncaster Sheffield Airport reopening: What needs to happen before flights return
Doncaster Sheffield Airport is moving closer to reopening after closing in 2022. Here is the latest on the work still required.
Aerospace Insights

11 Aug 2026

ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS Charity Cycle Ride group photo
ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS members are taking on a five-stage, 350-mile charity cycle from Belfast to Bristol, raising money for three causes while connecting colleagues and showcasing industry along the route.
UK targets Russian banks and shadow fleet in new sanctions package
British Prime Minister Andy Burnham welcomed President Zelenskyy to the UK.
UK targets Russian banks and shadow fleet in new sanctions package
Following President Zelenskyy's recent visit to the UK, Foreign Secretary Ed Miliband has introduced a range of sanctions on individuals and businesses helping facilitate Russia’s war in Ukraine.
Defence

11 Aug 2026

British Army trainees complete first CFS-endorsed drone operator course
British Army Eagle UAS training
British Army trainees complete first CFS-endorsed drone operator course
British Army personnel have completed the first Central Flying School-endorsed operator course for the Eagle uncrewed aerial system, marking a step towards more formalised drone training across the force.
Defence

11 Aug 2026

ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS Charity Cycle Ride group photo
ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS members are taking on a five-stage, 350-mile charity cycle from Belfast to Bristol, raising money for three causes while connecting colleagues and showcasing industry along the route.
HydroGNSS becomes first ESA Scout mission to complete in-orbit commissioning
HydroGNSS coherent channel detecting surface water at a high resolution, even when under a vegetation canopy.
HydroGNSS becomes first ESA Scout mission to complete in-orbit commissioning
Designed, built and operated by Surrey Satellite Technology (SSTL) for ESA, the HydroGNSS satellites are now able to provide data to researchers worldwide.
Member News Space

11 Aug 2026

UK opens £37m space infrastructure fund to take technologies from lab to mission
An artistic impression of the CLEAR mission
UK opens £37m space infrastructure fund to take technologies from lab to mission
A new £37 million UK Space Agency funding round will support the testing, manufacturing and scale-up infrastructure needed to help promising space technologies move from the laboratory towards commercial deployment and operational missions.
Most Read Space

11 Aug 2026

AXA XL’s S-RM acquisition puts UK manufacturing cyber resilience in focus
IT technician checks cyber security in the office
AXA XL’s S-RM acquisition puts UK manufacturing cyber resilience in focus
AXA XL’s acquisition of UK cyber consultancy S-RM comes as manufacturers face growing pressure to strengthen prevention, incident response and supply chain resilience.
Security

11 Aug 2026

ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS Charity Cycle Ride group photo
ADS Charity Cycle takes to the road for 350-mile Belfast to Bristol challenge
ADS members are taking on a five-stage, 350-mile charity cycle from Belfast to Bristol, raising money for three causes while connecting colleagues and showcasing industry along the route.
National Police Workforce and Wellbeing Survey results published
Police on patrol to protect Jewish citizens
National Police Workforce and Wellbeing Survey results published
The National Police Workforce and Wellbeing Survey 2026 - administered independently by Leapwise on behalf of Oscar Kilo, the National Police Wellbeing Service (NPWS) - is the largest of its kind ever conducted, providing a clear picture of the pressures police face in keeping us safe
Security

11 Aug 2026