The M4A1 Sopmod Winter Camo.zip file you have requested: Skins / Weapons / M4 Carbine / M4A1 Sopmod Winter Camo - 1.19mb is not available. Perhaps try browsing all files for the game Call of Duty 4: Modern Warfare and upload any files you want to share or are missing. This is the only information we could locate:
SP=Sopmod/M4/suppressors/reflex. MP=M4/suppressors/reflex. My first SOPMOD skin. Instructions included for both SP and MP.