www.toomanyguns.org, launched by the Greens, shows there are 12,038 registered firearms in the 2830 postcode area in Dubbo, owned by 2445 licensed firearms owners.

The Greens say individual registered owners are able to amass private arsenals due to a legislative “loophole” that should be closed down.

Greens MLC and gun control spokesman David Shoebridge acknowledged there were reasons why farmers, among others, may need more than one firearm.

But he questioned why anyone would need the “70, 100 or 300 firearms” shown in the website figures.

Dubbo MP Troy Grant earlier labelled the website “irresponsible” for demonising law-abiding firearms owners.

Mr Shoebridge said the party had been concerned about the accumulation of firearms in the community for some time.

“Our initial task with the data was to form an assessment, see if there are too many guns, see if there are unsafe accumulations of private arsenals,” he said.

“And the assessment makes it clear we’re on track to have a million registered guns by 2020 and we’ve got individuals with more than 300 guns in private arsenals and those individuals aren’t collectors.”

He said the Greens understood there were people who had a reasonable need for firearms, “particularly farmers”.

“They may need multiple firearms,” he said.

“A shotgun to deal with one kind of pest on the property, a 22 maybe to deal with foxes and rabbits and a larger calibre firearm to euthanise livestock or to deal with wild dogs.

“But why does any individual need 70, 100 or 300 firearms.

“That’s the problem and that’s what we’re trying to address.”

Mr Shoebridge labelled private arsenals “a public safety concern”.

“Just last week a single property with 15 registered firearms was robbed in the Hunter Valley and there were 15 guns in one moment that have entered into the illegal black market,” Mr Shoebridge said.

“And can either be used for crime or sold on the black market to fund criminal activities and why is our law allowing that to happen all across the state.”