Three men are still being questioned by Gardaí in Dublin after two handguns, ammunition and a silencer were found in Cabra.
The arrests were made on Thursday after guns were test-fired in the back garden of a house.
Four men and a woman - aged in their early twenties to late forties - were arrested at the property.
One of the men and the woman were yesterday released without charge.
Two of the men are being held at Store Street Garda Station and one is being held at Finglas Garda Station.