Police have released images of the terrorist hide which was uncovered at Carnfunnock Country Park near Larne at the weekend.
Four plastic barrels were found after being spotted by a member of the public on Saturday March 5.
Two barrels were empty but two contained a variety of bomb-making components including wiring, toggle switches, circuit boards, partially constructed timer power units, ball bearings and a small quantity of explosives.
Detective Chief Inspector Gillian Kearney, from Serious Crime branch, said: “The seizure of these items has potentially saved lives.
“Our enquiries are progressing and a detailed forensic examination of all these items will take some time.
“At this stage, it is too early to attribute ownership of these materials to any particular grouping or individual.
“It is vital that people remain vigilant, wherever they are and whatever they are doing.
“We will continue to work to keep people safe and would ask anyone with information about suspicious, criminal or terrorist activity to contact police. “As has been shown by the events of last weekend, if people provide us with information, we will act on it to ensure everyone is kept safe.”