Detectives are investigating if the thwarted murder attempt is linked to the Kinahan-Hutch feud or a local dispute.
A 24-year-old man from Crumlin was arrested on Tuesday night on Old County Road, around the corner from the homes of senior Kinahan cartel bosses.
Local detectives from Sundrive Garda Station were praised yesterday for spotting the gunman, who is a known criminal.
When they stopped his car they recovered a loaded firearm. A source said the arrest “most definitely save lives”.
Detectives don’t suspect the gunman was about to travel across the city to conduct a shooting and that the gun was going to be used in the local area.
It comes less than a month after gardaí foiled a Kinahan murder team not far away on the junction of Long Mile Rd and Naas Rd.
But detectives are also investigating if Tuesday’s arrest is connected with a separate, locally based feud.
That feud — which previously claimed the life of a youth and the near killing of an unarmed garda — appeared to be resurrected last month after an attempted murder of a man on nearby Monasterboice Rd.
The general area has been receiving significant levels of patrolling since the Kinahan-Hutch feud broke out, and was ramped up again after the murder of Gareth Hutch on May 24.
Roaming checkpoints and patrols, involving regional support units and the Emergency Response Unit, as well as local units, are a common feature, backed up by the Garda helicopter.
Sources said Tuesday’s arrest shows that gunmen are willing to “take the risk and run the gauntlet” of being apprehended.
The areas of Crumlin, Drimnagh, and neighbouring south inner city have been on alert awaiting retaliation from associates of the Hutch gang, which is based in the north inner city.
While the Hutch gang carried out one murder, the Kinahan cartel is behind at least six murders, one in Spain and five in Ireland.
Four of those, including two members of the Hutch family, took place in the north inner city. Gardaí are also investigating if the murder of David ‘Daithi’ Douglas in the south inner city on July 1 is connected with the feud.
It comes as Garda figures show that 6,221 checkpoints, 872 mobile patrols, and 2,196 searches have been conducted under Operation Hybrid, covering both sides of the city.