Five weapons and ammunition were found after officers stopped a Ford Mondeo on Irvine Road in Largs on Tuesday during an intelligence-led operation.
Witnesses to the stop say plainclothes officers in an unmarked car carried out the arrest.
A 43-year-old man was arrested at the scene and a 37-year-old man was subsequently arrested from an address in Stevenston in connection with the incident. Both men have been charged and will appear at Kilmarnock Sheriff Court on Thursday, September 3.
Detective Inspector Martin McGhee, of Police Scotland’s Specialist Crime Division, said: “Information from the public about alleged criminality can be vital and helps us protect communities.
"I would ask anyone who has information about the criminal use of firearms to contact us on 101. If you would prefer to remain anonymous, you can pass on information via Crimestoppers on 0800 555 111."
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