Gardai have carried out a series of searches across Cork City and County as part of an investigation into the activity of dissident republicans.
A team of 60 detectives searched premises in the city and the north of the county.
Gardai said no arrests have been made.
Dissidents from the Real IRA in Cork last week issued death threats against drug dealers in the area.
The terror group has already claimed responsibility for the murder of Gerard Staunton last month.
Staunton, 42, was shot a number of times as he got into a car outside his home in the Westlawn in Wilton area of the city.
In a statement issued through the 32 County Sovereignty Committee, the Real IRA singled out another man who was given a six-year suspended sentence last year for a €250,000 heroin seizure, the biggest ever in the city.
The group also claimed mothers of addicts were being forced to take loans from credit unions to clear debts owed to dealers.
The death threats were issued on a flyer dropped in some bars in the city and county.
Garda Commissioner Fachtna Murphy acknowledged last month that dissidents have been active in the county.
Gardai said the investigation centred on both dissident republican and criminal activities.
Several weapons, believed to be imitation firearms, were recovered along with a quantity of cash and a small amount of drugs.
The guns have been sent for ballistic tests.
© Press Association