Tekashi69 must not have gotten a good grip on that cop's hand back in May -- allegedly, of course -- 'cause his felony assault on a police officer charge didn't stick ... TMZ has learned.
Law enforcement sources tell us Tekashi's felony assault on an officer charge was reduced to a basic misdemeanor assault charge. Tekashi was facing up to 7 years in prison before. Now, he's just facing up to a year in jail.
As we reported ... Tekashi was booked for assaulting a...