Depending on caliber and application, Hornady's Black has the best bullet options are selected for each round to deliver the accuracy and performance you've come to expect from Hornady. Suppressed or unsuppressed, supersonic or subsonic, rifle, mid-length, carbine, or pistol, Hornady Black has optimized offerings for superior performance in a variety of platforms. Special clean-burning propellants result in a reduced muzzle flash, even in short-barreled rifles. Internal ballistics and bullet weights are optimized for accuracy and consistency. Specifications: 5.56x45mm NATO /62 gr/Full Metal Jacket (FMJ)/20 Per Box/10 Cs