5.56mm Anti-zombie

5.56 Anti-Zombie (also known as the 5.56 AZ) is a rifle cartridge designed for engage zombies.It is used by Skull series firearms only.

Overview
The 5.56 AZ is very effect when it's used against zombies,because it has very high penetration power.The player can hold up maximum 240 rounds ammo in normal,deathmatch,team deathmatch and even zombie modes.It cost $200 for each 30 rounds.

Weapons
These following weapons use this cartridge:
 * Skull-7
 * Skull-5

Trivia

 * This cartridge doesn't exist in real life,but it's obviously based on the 5.56 NATO rounds.