User blog comment:Deathmanstratos/Call of Duty: Black Ops II Origins Intro Cinematic released/@comment-26535669-20130820171846/@comment-1187559-20130821135253

Raven - only works if you pick up your weapon first, otherwise you get disarmed and whatever weapon you pick up next is permanent. Or at least that's how AC2 worked. I sort of just use Hidden Blade on AC:B since it's such a quick counter-kill.