Personal Defense Ammunition
200-round case, 20 or 50 count box
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.