Weapons seized at airport
The UK Border Force said two illegal air rifles had also been seized.
The majority of the items have been found in luggage off-loaded from holiday flights returning from Bulgaria, Turkey and Croatia.
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Hide AdThe force has warned those found with such weapons could face imprisonment.
John Spence, from Border Force in Northern Ireland, said: “My message to holiday-makers is simple - don’t do it.
“We know which flights are being used to bring weapons into the UK and, as these recent seizures show, we’re very effective at finding them.
“At best, you’ll have the weapons taken off you; and at worst you’ll face a criminal conviction.
“If you are caught smuggling, you could face severe delays and penalties, including imprisonment.”