This model is in 1/700 scale. The aircraft are unarmed. Note that the pilot's canopy is intentionally offset to one side as per the actual design. The 12x Canberra Bomber aircraft are connected as a single sprue by a wire under the main body of the aircraft. Once the wires are cut the model does not require finishing.
According to Wikipedia: "The English Electric Canberra is a British first-generation jet-powered light bomber manufactured in large numbers through the 1950s. The Canberra could fly at a higher altitude than any other bomber through the 1950s and set a world altitude record of 70,310 ft (21,430 m) in 1957. Due to its ability to evade the early jet interceptors, and its significant performance advancement over contemporary piston-engined bombers, the Canberra was a popular export product and served with many nations."