Man gunned down at point blank range as he sat next to his fiancee in western Sydney

Shot dead in front of bride-to-be

A man murdered on a western Sydney street was shot at point blank range as his fiancee sat next to him.

The 29-year-old had just paid a brief visit to a house in Sydney Street, St Mary's at 7pm on Friday and was returning to his car where his fiancee was waiting, Deputy Chief Inspector Grant Taylor told reporters on Saturday.

As he was getting into the car, two men wearing balaclavas, who detectives believe are members of an outlaw motorcycle gang, pulled up in a silver Holden Commodore and shot him several times with semi-automatic hand guns.

One shooter got out of the car and shot the victim once more at point blank range as he lay in the gutter.

Then the killers drove off.

"They certainly wanted to make sure this individual was deceased," Insp Taylor said.

"(The fiancee) was very, very lucky not to be killed herself.

"A number of projectiles entered the vehicle she was sitting in and by the grace of God they missed."

Police do not believe the victim had formal links to a outlaw bikie gang but say he was "closely aligned" with one.

His body has not been formally identified by family so his name is yet to be released.

Investigators want to know if any members of the public witnessed the silver Holden Commodore loitering in the area.

"This vehicle was either lying in wait and was aware that the deceased was at this location or the deceased was followed from the Lidcombe area," Insp Taylor said.