5.56X45MM/223

5.56×45mm / .223 covers one of the most widely produced and technically varied rifle cartridge families of the modern era. Developed in the mid-twentieth century and adopted by NATO, the 5.56×45mm cartridge and its closely related .223 Remington counterpart have seen extensive military, law enforcement, commercial, and experimental use worldwide.

This category includes military ball, tracer, armor-piercing, incendiary, and special-purpose loads, along with commercial sporting ammunition, match cartridges, blanks, dummies, plastic-case training rounds, experimental wildcats, proof loads, and instructional examples. Variations in projectile design, core materials, case construction, headstamps, and packaging reflect decades of continual development and adaptation to different roles and platforms. The breadth of material here makes this category especially valuable for collectors interested in modern military ammunition evolution, NATO standardization, training and logistics cartridges, and the intersection of military and civilian small-arms development.