The Sterling .308 was a prototype battle rifle designed and manufactured by British firearms company Sterling Armaments.
The .308 prototype was essentially an enlarged Sterling L2A3 submachine gun, chambered for 7.62x51mm NATO. It was fed through a 20-round L4A4 Bren magazine which was not side-fed, unlike the L2A3. It fired from a closed bolt. Two different prototype designs were made during the 1960s; neither were particularly developed weapons, lacking basic features such as a stock.