The victim, who was aged 38, was shot while reversing a van out of his driveway at about 7am on Cherry Orchard Avenue in Ballyfermot.
Gardaí do not believe he was involved in criminal activity.
A burned-out car was discovered shortly after 7am at Inagh Road, not far from the scene of the shooting.
Man Shot Dead In West Dublin (Irish Times)
(Sasko lazarov/Photocall Ireland)
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