Gardaí seized a firearm, ammunition and two vehicles during a search operation in Baldoyle, Dublin 13 on Wednesday evening.
Investigations by gardaí who are monitoring an escalating feud in north Dublin led to a sawn-off double barrelled shotgun being seized as well as two cars that have been used for organised criminality.
The family-linked feud has led to a number of violent incidents in the past number of weeks with its participants based in the Moyne Road area of Baldoyle and Belcamp Lane in nearby Priorswood.
