A man in his 30s was arrested after gardai found a rifle with a scope and cannabis worth €2,300.
The search took place in the Cloyne area of Cork just after 5pm on Sunday.
Gardaí also seized a quantity of small plastic bags and a weighing scales.
The firearm and drugs will now be sent for analysis.
The man was arrested at the scene and detained at Midleton Garda Station.
A garda spokesman said: "Gardaí have seized a suspected firearm and €2,300 of suspected cannabis herb in Co. Cork on January 24, 2021.
"Shortly after 5pm, Gardaí from the Midleton District Drugs Unit, assisted by uniform Gardaí, executed a search warrant at a house in the Cloyne area of Cork.
"During the course of the search Gardaí seized a suspected rifle and scope along with €2,300 of suspected cannabis herb.
"Both the suspected firearm and the suspected drugs will now be sent for analysis.
"A man, aged in his 30s, was arrested at the scene and detained at Midleton Garda Station under Section 4 of the Criminal Justice Act, 1984.
"He has since been released and a file will be prepared for the Director of Public Prosecutions."
