Mr Barbaro was no stranger to gangland hits. His grandfather and father were both taken out in targeted strikes, according to the Telegraph.
The crime figure, rumoured to be a high-ranking informant for the state's Crime Commission, avoided a shooting just days ago.
Last Monday night Mr Barbaro ran from a hail of bullets aimed at him as he stood outside a Leichhardt business. Following this incident an officer told the Telegraph the shooting had "all the hallmarks of an attempted professional hit, except they missed".
He was due to face court next month over manufacturing the drug ice.
Following last night's fatal shooting, crews were called to a vehicle fire at Goddard Park in Concord about half an hour later. Police believe the vehicle, an Audi Q7, may have been involved in the Earlwood shooting.