PSNI detectives carried out a planned search of a house in Larne on Thursday, 7th July.
A firearm and suspected pipe bomb were removed from the house.
Also found during the search was a quantity of cannabis, drug-related items, a quantity of pregabalin/ mirtazapine tablets and a number of mobile phones.
Detective Inspector Lenaghan said: “Police remain fully committed to tackling the scourge of drugs and linked criminality.
“We will continue to proactively investigate and carry out searches to tackle this issue.
“I would appeal to anyone who knows anything about illegal drugs or drug dealing in their area to contact police on 1101, or submit a report online using our non-emergency reporting form via www.psni.police.uk/makeareport/.
“You can also contact Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org/”