5.56×45 vs 5.56 NATO: Deciphering the Differences and Their Significance
The Origins of the 5.56x45mm: A Brief History Early Developments The story of the 5.56x45mm begins with the .223 Remington, a civilian cartridge developed in the late 1950s. Originally designed as a varmint-hunting round, its potential for military applications was quickly recognized. The .223 Remington offered a lightweight, high-velocity alternative to the heavier cartridges of … Read more