5.56 MM ELP CLASS-C MORTAR PROJECTILE. CARTRIDGE HEADSTAMP R-P 223 REM. (This is a Class-C projectile based on the Fire Piston Principle). Originally engineered for the greatest possible immediate deep impact to creatures with high-tolerance nerves systems, such as Hard Surface Reptiles in general. Because of specialized Product Engineering this Class-C projectile has delayed detonation on medium hard surfaces, producing elevated internal Fragmentation for controlling Tree/Ground Dwelling Critters (Dirt Mound/Tree House Destruction) and Crocks around the Golf Course (Reduced Divots).