The 5.56×45mm NATO is a small-caliber, high-velocity cartridge primarily used by military forces around the world. Developed in the 1960s, it was designed to provide effective range and accuracy while minimizing recoil. This cartridge is commonly chambered in rifles such as the M16 and M4, making it a standard issue for many NATO countries. The 5.56×45mm NATO cartridge features a bullet diameter of 5.56 mm and a case length of 45 mm. It is known for its lightweight design, which allows soldiers to carry more ammunition without adding significant weight. Its versatility makes it suitable for various applications, including combat and training scenarios.