The 5.56mm M193 has a plain tip. As the Centerfire Sporting, or .223 Remington, it first appeared in 1957 as an experimental military cartridge. In 1964, it was officially adopted by the U.S. Army as the 5.56mm Ball cartridge M193.
It has proven to be an effective military cartridge for fighting in jungle or forested areas and for close-in fire support. The cartridge was first combat-tested in Vietnam in the early 1960s. It is used in the M16, M16A1, M16A2 and M4 rifles, and the port firing weapon M231.
Cartridge, 5.56mm, BALL.
Unpainted bullet tip. For use
against personnel and unarmored
5.56 Ball, .223 Armalite, .223 Remington Special, 5.56mmx45mm
Suitable for use in most weapons with a 1-in-12 barrel twist (one turn in 305mm). Rifles, 5.56mm--M16 and M16A1, M16A2, AR15, H&K, Galil, Ruger, FN, SIG, and other compatible systems.