The Royal Air Force Regiment (RAF Regt) is a specialist airfield defence corps founded by Royal Warrant in 1942. After a 32 week trainee gunner course, its members are trained and equipped to prevent a successful enemy attack in the first instance; minimise the damage caused by a successful attack; and ensure that air operations can continue without delay in the aftermath of an attack. RAF Regiment squadrons call upon aggressive defence whereby they actively seek out infiltrators in a large area surrounding airfields.

The RAF Regiment are trained in CBRN (Chemical, Biological, Radiological and Nuclear) defence and equipped with advanced vehicles and detection measures and RAF Regiment instructors are responsible for training all Royal Air Force personnel in basic Force Protection, such as first aid, weapon handling and CBRN skills. Members of the regiment are known within the RAF as 'The Regiment', 'Rock Apes' or 'Rocks'.