Fans applauded Luigi Mangione 's lawyers Karen and Marc Agnifilo as they left court Tuesday morning after a judge threw out 2 state murder charges related to acts of terrorism.

We caught them exiting the New York City courtroom ... they remained nearly tight-lipped about Luigi, though Marc let us know he's feeling "positive" as Sean "Diddy" Combs ' sentencing quickly approaches. Remember -- his federal sentencing for his conviction on 2 counts of transportation to engage in prostitution is scheduled for October 3. Gallery Launch Gallery TMZ.com

Marc was a bit chattier than his better half ... letting TMZ know today's hearing with Luigi is a "big win" and "the first of many."

We did get a peep out of Karen at one point when she thanked cheering fans for coming out

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