A cruel and unforgiving world, an enemy of unclear origin hellbent on finishing a war of extermination, its victims and their desperate attempts at resisting proving just as futile as the hopes of the men who led them. Many died and would continue to die, none of them doubted that reality. But what if...

The M4A1 follows a modular design philosophy, and continues to improve on the foundation of M16A2's M4 variant as a carbine weapon. My primary use is in the arsenals of Special Forces. Although I've had a tumultuous adoption history, my light weight and close-range stopping power eventually led to my popularity on many battlefields. War is ever changing.-M4A1 (Warning: Complete AU)