Four teenagers are among a group of six people charged months after a man survived a shooting involving two guns, a dozen bullets and five burned-out cars.
Police are probing a construction company over alleged links to the men after seizing devices and other documents.
"They are all known to one another and in fact, a lot of them are linked to a particular construction company," NSW Police Detective Superintendent John Watson told reporters on Tuesday.
A 27-year-old man was shot in the head and chest in a car park at Campsie in Sydney's southwest about 9.20pm on September 12.
He was taken to hospital but has since recovered.
Police believe the shooting was financially motivated.
"It is very clear in our minds that this group were essentially guns for hire," Det Supt Watson said.
The six men arrested are allegedly part of a well-established and organised group who surveilled the 27-year-old for weeks leading up to the shooting, he said.
But police are yet to identify who hired the group or pulled the trigger.
Police released CCTV footage from the car park in February showing an unidentified man rapidly firing two pistols.
Up to 12 shots were believed to have been fired from two .45-calibre semi-automatic pistols that have undergone forensic examination after being recovered by officers.
A white Mercedes that police believe was used as a getaway car crashed into a house at nearby Kingsgrove.
It was one of five cars found burned out around Sydney that police allege were used in the shooting.
Five men were arrested following early morning raids around Sydney on Thursday, including a 22-year-old man at Granville and a 19-year-old man at Greystanes.
They were both charged with shooting with intent to murder and participating in a criminal group, as well as other offences.
The 19-year-old was charged along with two other men, aged 18 and 20, with destroying property in company using fire.
Another 19-year-old arrested at North Parramatta faced court on Thursday charged with weapons offences following a raid where police allegedly found gel blasters, replica revolvers, a crossbow and knuckle dusters.
All five men were refused bail in Parramatta Local Court.
Another 18-year-old man, who was already in custody, was charged with destroying property by fire after being taken to a police station on Tuesday morning.
