Gardaí have seized 10 guns as part of an operation into serious organised criminal activity.
It is part of ongoing investigations by the Garda National Drugs and Organised Crime Bureau.
A search was carried out in a rural area of north county Dublin on Friday evening.
A total of 10 guns and a quantity of ammunition were uncovered.
These have been seized and are the subject of a technical examination.
Assistant Commissioner John O'Driscoll said: "The undertaking of the operation leading to the discovery of a significant quantity of firearms and ammunition yesterday reflects the fact that An Garda Síochána's unrelenting efforts in tackling serious and organised crime will continue unabated into 2020".