A 22-year-old man was arrested following the find of a suspected firearm and drugs in the Kilwilkie area of Lurgan.
The arrest followed a planned search of a house last Thursday.
Three cars were seized and a suspected firearm and a quantity of suspected drugs were found and recovered.
Detective Inspector Stephen Harvey said: “The 22-year-old man was later released on police bail pending further enquiries.
“I am glad that a suspected firearm and quantity of suspected cannabis resin and class C tablets have been taken off the streets.
“Anyone with any information about serious crime or the illegal use and supply of drugs in their area is asked to contact their local police station on the non-emergency number 101.
“Or if someone would prefer to provide information without giving their details, they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.”