Gamers find your Kevlar, because this weekend the bullets will fly as Call of Duty 4: Modern Warfare Variety Map Pack hits half-price on the Xbox LIVE online entertainment network for a limited time. Starting Sept. 12 (8:01 pm/GMT) and running through 8.00pm on Sept. 14, Activision Inc.’s blockbuster DLC by Infinity Ward will be available for 400 Microsoft Points. As part of the limited time offer, Xbox LIVE will also will host a Double XP Weekend, allowing players to earn twice as many Experience Points. Additionally, during the release, the limited edition Prestige gamer pics will also be made available, for free download on Xbox LIVE Marketplace.

Members of Infinity Ward will also be online between 8.00pm – 12:00 am/GMT on Saturday, September 13 to play with fans. While online, players should be sure to add the following Infinity Ward gamertags to their friends list:

Fourzerotwo
COD4artistWill
COD4qaEd
COD4qaJustin
COD4designerJon
COD4designer1
COD4designer2
COD4studioVince
COD4studioJason