I could say that Tucker Carlson has "misunderstood" Australian gun laws, but that would imply that he'd made an attempt to understand them.
The US gun lobby has used Australia as a straw man for some time. When I first moved there in 2000, people told me that the Australian government had taken away our guns; I told them this wasn't true. The NRA had produced videos claiming Australians "lived in fear" with footage of high-walled yards and elaborately fenced houses in leafy suburbs. I explained that these were affluent neighbourhoods, where the fences and gates were signs of status. One friend said, "Oh! Now I understand that scene in The Castle" :)