The problem is there are already more then 300 million guns in the USA and they are not going anywhere.
By comparison John Howard's gun buy back only covered 700,000 guns and still left about 2 million guns in circulation. This video gives some interesting info on how the Australian Buy-back would work in the USA
no doubt that is a problem.
but the answer to that problem isn't just to stick your head in the sand and not do anything ever.
Very true - they just need to do things that work.
your solution didn't work.
how many Mass shootings have there been in australia since the Gun Buy back?
how do you define "mass shooting'?
why are you asking me? you could google it - and you'll find the answer in about 500 different places.
https://www.usatoday.com/story/news/nation-now/2018/02/15/australia-hasnt-had-fatal-mass-shooting-since-1996-heres-what-did/340345002/
I was asking you because those 500 different places would have 500 different definitions.
Yet not one of those definitions would have the United States faring better than Australia