Gardaí arrested one person and seized two shotguns and ammunition during the search of a home in Ballinasloe on Monday.
The search at Woodlawn was part of an ongoing operation targeting criminal activity in the Galway Division and surrounding areas.
Gardaí recovered two firearms, ammunition and a cocaine press.
The firearms have been forwarded for a technical examination by the Ballistics Section of the Garda Technical Bureau.
A man aged in his 40s was arrested and is currently being detained at a station in the Garda North Western Region under Section 30 of the Offences Against the State Act 1939.