From now until Monday evening you will be able to achieve Double XP and Double Weapon XP in Call of Duty: Infinite Warfare Multiplayer.
Simply start playing right now to rank up with Double XP, or any point from then until 6pm GMT Monday November 21st.
Additionally, Infinity Ward will be hosting a studio live-stream at 7pm GMT, so make sure you tune in for the latest details and information on Infinite Warfare via: www.twitch.tv/infinityward