Police have raided a home on the Central Coast as part of a series of search warrants in an ongoing investigation into 3D printed guns.
NSW Police and Australian Police Force detectives, who are part of the National Anti-Gangs Squad, began the investigation in May last year after receiving information related to the alleged manufacture and supply of prohibited firearms across NSW.
Earlier this year, the squad seized 3D printed sub-machine guns, three other firearms and 28 sticks of explosives as part of the investigation.
In the latest development in the ongoing investigation, detectives swooped on a home at Woy Woy early on Wednesday morning and searched the property.
It came after detectives searched four premises in the Sydney suburbs of Georges Hall, Brighton Le-Sands and Bankstown on Tuesday.
Police allegedly seized a firearm, ammunition, luxury watches, mobile phones, handcuffs, $20,000 in cash and nine stolen vehicles during the raids.
A 21-year-old man was arrested at Woy Woy after Wednesday morning's search and taken to Gosford Police Station, where he was helping investigators with their inquiries before he was released without charge.
The Newcastle Herald understands police are continuing their inquiries into possible persons of interest in relation to the Central Coast search warrant.
Meanwhile, a 38-year-old man was arrested at Georges Hall on Tuesday and charged with 37 counts. He was refused bail and was expected to face Parramatta Local Court on Wednesday.
NSW Police Detective Superintendent Robert Critchlow the investigation had been looking into "serious and very high level organised crime".
He said the seizure of 3D printed guns was a "great concern" to police.
Detective Superintendent Critchlow said those types of weapons were not common, but were increasingly becoming so.
"These items, these weapons, are a serious risk to public safety," he told reporters in Sydney on Wednesday.
"They're extremely dangerous weapons.
"They will fire bullets, they will kill people."
AFP Detective Superintendent Matthew Ciantar said police would be relentless in tracking down those responsible for making potentially lethal 3D guns.
