The 78-year-old is charged with a dozen offences. Police also said they found C$300,000 at his home.
The court sided with gun owners who argued the limit on firearms on publicly accessible private property, like restaurants or shopping malls, violates the Second Amendment.
Justice minister Naomi Long ended a consultation seeking views on plans to increase the cost of a gun license on Wednesday.
Luke Fortune, 22, has admitted buying almost 40 hand guns and more than 1,000 bullets.
The government is looking at changes to licensing after the Keyham mass shooting in 2022.
The reforms are in response to Australia's worst mass shooting in decades at a Jewish festival in December.
The PSNI is asked to consider if it is doing enough to provide an alternative system for people struggling to register firearms.
The US capital doesn't allow people to register ownership of semi-automatic guns as a way to keep the weapons out of Washington.
Civil liberties advocates say laws 'damage our democracy' while others say they scapegoat gun owners.
