The British Defence Industrial Sector produces a wide range of products and services for the UK Ministry of Defence, including aircraft, ships, submarines, armoured vehicles, missiles, munitions, electronics, communications, and other defence-related equipment.

The biggest selling British weapon is the SA80 assault rifle, which has been in service with the British Armed Forces since 1985. It is a gas-operated, selective fire weapon that is chambered for the 5.56x45mm NATO round.