The passenger was released while the driver has been charged with a number of firearm offences, including possess unauthorised pistol in public.
He was remanded in custody to appear at Central Local Court on February 11.
In a separate incident on February 4, officers searched the home of a 26-year-old man on Canterbury Road at Dulwich Hill, seizing a double barrel shotgun, a .223 rifle, a .22 repeating rifle, a 7.62 rifle and ammunition.
The man, also alleged to be an associate of the Hells Angels OMCG, has had his firearms licence suspended, police said.
A day earlier, police allegedly discovered two flick knives on a 23-year-old man on George Street at Parramatta. He's believed to be a member of the Notorious organised criminal group.
He has been charged with custody of a knife in a public place and was granted conditional bail to appear at Parramatta Local Court on March 23DISCLAIMER:Text may be subject to copyright.This blog does not claim copyright to any such text. Copyright remains with the original copyright holder.