Patch 1.20 for Call of Duty: Modern Warfare and Call of Duty: Warzone has just gone live across all platforms. Along with the release of the brand-new KM9 Bruen light machine gun, Gunsmith customs and a new contract in Warzone, the long-awaited release of the new Obsidian camouflage is finally here. Find out everything you need to know about the Obsidian camo including how to unlock it and the cha...