[quote=@Penny]
It is a little hard to see how a regulation which would actually help would ever be considered constitutional. A system like Australia uses for example would probably have a positive effect but it would almost certainly be eviscerated by the courts (even if angels came down from heaven and forced congress, the senate and the president to sign off on it - presumably at gun point).
[/quote]

[i]Well here's hoping you never claim, you don't want to ban/take guns away.[/i]

Australia's "system" was a mandatory gun buyback program that forced people to give up their weapons and it didn't drop crime in the slightest. (I guess even it's own government admitted it's failings.)

http://www.dailymail.co.uk/news/article-3562714/Australians-guns-did-1996-Port-Arthur-massacre-revealed-country-imported-record-number-firearms-year.html

To spare everyone a link to the huffington post. Let me just post a part of an article...

[quote]
"As the United States grappled with yet another senseless mass shooting, this time in Las Vegas, Australia was dealing with a gun problem of its own.

Namely, just exactly what to do with more than 26,000 firearms surrendered to authorities during a three-month national gun amnesty."
[/quote]

Yeah you can't "like the 2nd amendment" and think even for a split second that we should be more like Australia. Sorry, that's my own personal line in the sand...

https://bearingarms.com/bob-o/2016/10/21/australia-admits-gun-buyback-failure-amnesty/