The 7.62×51mm NATO is a rifle cartridge developed in the early 1950s for use by NATO forces. It features a bullet diameter of 7.62 mm and a case length of 51 mm, making it suitable for a variety of firearms, including battle rifles and machine guns. This cartridge is known for its accuracy and effective range, making it a popular choice among military and law enforcement agencies. The 7.62×51mm NATO is often compared to the civilian 7.62×51mm cartridge, which is similar but may have different specifications. It is commonly used in firearms like the M14 rifle and the FN FAL. The cartridge's design allows for effective performance in various environments, contributing to its widespread adoption in military applications.