Call of Duty: MW3 – what is a gun proficiency?

This post was uploaded before COD: MW3 was released. For up to date information, plus hints & tips on how to get the best out of the game, subscribe to my new channel: YouTube.com/iKingOfHouse Delegates of September’s COD: XP event ¬†were the first to see this¬†Modern Warfare 3 multiplayer preview. At the time, I noted […]