Gardaí have seized two guns along with drugs valued at about €20,000, some €22,000 in cash and a watch and clothing with an estimated value of €30,000 in Dublin.
Two men, aged 26 and 32 years, were arrested at the scene of the seizure and have been taken into custody.
The search operation, which was intelligence-led and targeted those suspected of involvement in the drugs trade, took place at about 5pm on Thursday in north Dublin.
An address was searched at Palmerston Hall, Dominick Street, Dublin 7, where the guns , heroin and cannabis plants were discovered.
The arrested men were detained under Section 2 of the Criminal Justice (Drug Trafficking) Act and were being held at Mountjoy station for questioning on Thursday night.