Coolio and his crew were just cuffed at LAX for allegedly trying to get a loaded firearm through security. Law enforcement sources tell TMZ the rapper and his team were leaving L.A. Saturday morning when they got flagged by the TSA. We’re told a book bag belonging to the group contained a loaded gun. Our sources say a member of Coolio’s crew claimed the bag, but witnesses have told cops it was Coolio’s. Cops are currently reviewing video footage and taking witness statements to sort out who owns the gun and bag. A rep for Coolio tells TMZ the gun belongs to the rapper’s security guard but he’s been detained…