[Lurkinanloomin]

Canada is a bad example, they recently scrapped their long gun registry because no one registered. Non-compliance on a massive scale got them to back down.

[Kozy]

Granny is batty.
First of all three countries do not have the Second Amendment. If some one wants to turn in their gun say for $100,000 that is their choice. Heck I’ll buy one on the street from a DEA agent and sell it back to Uncle Sam.

Oh ask Australia is doing now without guns in the hands of citizen? Not so good.

[Cboldt]

Noncompliance coupled with huge costs and no benefit.
Sounds like a perfect example for a US federal program.