In this guide, you will find out how to Unlock BLUE AZUL CAMO in Modern Warfare 2.
First, you have to boot up your game, then go to your side arms, and select the X12 as it is the 3rd handgun. You have to equip this and then click on Gunsmith.
In the gunsmith, you have to go to Customize, then click on the Camo category, and select whiteout. To unlock it, you have to upgrade the X12 to level 19. You have to get 40 kills with the akimbo attachment with this weapon to get the solid blue camo.