With the creation of NATO, several programs were put into place for militaries of these nations to have some sort of compatibility. One part of that would be standardization of small arms ammunition. Throughout the NATO countries numerous calibers and different types of weapons were being used. The United States had great influence in the NATO ammunition trials, or it could be better said, they drove it. Even after World War II and the success of the StG44 Sturmgewehr or assault rifle, NATO countries….