I'm an Australian living in California and from time to time, I ship parts and accessories to my nephew living in Sydney. He is a Police Officer as well and have import permit on restricted items such as magazines, fire control components and barrel.
No import permit = Do not send any fire control components, magazines and any barrel.
Any others are ok but I strongly recommend other party to contact the Australian Customs first
On Second Amendment:
You wonít get gun control by disarming law-abiding citizens. Thereís only one way to get real gun control: Disarm the thugs and the criminals, lock them up, and if you donít actually throw away the key, at least lose it for a long timeÖ Itís a nasty truth, but those who seek to inflict harm are not fazed by gun controllers. I happen to know this from personal experience.Ē