Call of Duty: Black Ops 2 developer Treyarch has dated its next double weapon XP event, kicking off this weekend. Treyarch published a new in-game message of the day yesterday, confirming that the double XP weekender would start May 17. The message reads, “Don’t even think about resting those thumbs, because Double Weapon XP weekend is coming this Friday, May 17, starting at 10am/PDT and running though Monday, May 20 at 10am/PDTâ€. Source VG247.