The United Kingdom Ministry of Defence has launched Project Grayburn as the successor to the SA80 L85A3. Officials posted a notice for an industry day late in November to obtain input on offered systems, capabilities and manufacturing packages. The first public step occurred in January via a concept-stage tender that called for no fewer than five variants.

A 15-year contract valued at £2 billion including VAT is under development, though rifle numbers stay unspecified. Delivery is now due to begin in July 2029 and last until March 2045.