In this tutorial says, you can download Call of Duty : Black Ops II Dragon Camo Pack DLC free on your Xbox 360 game. So to download this Black Ops 2 Dragon Personalization Pack, you can visit following official web site,

http://www.dragonpackfree.blogspot.com/

After you read the instruction on the web site and get your Black Ops II Dragon Camo DLC code, you can visit your Xbox Live Marketplace and redeem your own DLC code. After redeem complete you will able unlock and download your Black Ops II Dragon Personalization Pack free on your Xbox 360. So if you have any more problems about this tutorial, you can comment about it on our web site. Thank you guys.

Inspired by the armored body of a mythical dragon, the Call of Duty®: Black Ops II Dragon Personalization Pack comes loaded with a dragon scale-themed weapon skin, three uniquely-shaped reticles, and an all-new Calling Card. (NOTICE: Reticles will only be available for ACOG, EOTech, Hybrid and Reflex optics.)