The Mk 45 Mod 4 upgrade will incorporate a longer 62-calibre barrel. Credit: © US Navy photo/BAE Systems.

The US Navy has contracted BAE Systems to upgrade Mk 45 5-inch naval gun systems, including the overhaul of existing systems, to the Mk 45 Mod 4 configuration.  

This modification, worth $23.5m, supplements a prior $47m contract, culminating in a total value surpassing $70m.  

Go deeper with GlobalData

Data Insights

The gold standard of business intelligence.

Find out more

Related Company Profiles

View all

The Mk 45 Mod 4 upgrade will incorporate a longer 62-calibre barrel and reinforced gun mount, alongside a fully digital control system that seamlessly integrates with existing targeting and fire control data.  

These improvements are designed to accommodate modern munitions with increased firing energy and pave the way for future precision-guided projectiles with extended ranges.  

This initiative represents a cost-efficient strategy to furnish US Navy personnel with enhanced long-range strike and defence capabilities.  

The modernisation of these gun systems will deliver latest technology to support ammunition types and future operational needs, all at a lower cost.  

How well do you really know your competitors?

Access the most comprehensive Company Profiles on the market, powered by GlobalData. Save hours of research. Gain competitive edge.

Company Profile – free sample

Thank you!

Your download email will arrive shortly

Not ready to buy yet? Download a free sample

We are confident about the unique quality of our Company Profiles. However, we want you to make the most beneficial decision for your business, so we offer a free sample that you can download by submitting the below form

By GlobalData
Visit our Privacy Policy for more information about our services, how we may use, process and share your personal data, including information of your rights in respect of your personal data and how you can unsubscribe from future marketing communications. Our services are intended for corporate subscribers and you warrant that the email address submitted is your corporate email address.

Production will be carried out at BAE Systems’ facility in Louisville, Kentucky, with an expected completion by the end of 2028.  

BAE Systems Weapon Systems vice-president Brent Butcher 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.”  

The UK has already begun incorporating the Mk 45 Mod 4A system on its Type 26 anti-submarine warfare frigates, with HMS Glasgow being the first to receive this upgrade.  

All eight Type 26 frigates are set to be equipped with the Mk 45 Mod 4A, which has been produced by BAE Systems and is currently in service with the US Navy and other maritime forces.