5.56 55gr FMJ
5.56x45mm in Starline brass with the 55 grain full metal jacket (FMJ) projectile. It is one of the most commonly used rounds for the AR-15 platform. The 55 grain projectile (.224 diameter) is the ideal weight for a wide range of barrel twist rates to include the 1-in-7, 1-in-9, and 1-in-8.
Only available in 50ct boxes.
