I raised these issues on Facebook but I'll repeat them here:
I do question how effective gun control laws would actually be in America at the moment. Obviously it is ideal in principle to have some form of gun regulation, but I have no idea how they could effectively implement it. America has the highest gun ownership rate in the world, meaning a buy-back scheme like we did in Australia isn't economically feasible. Further, how do you encourage Americans to surrender or register their firearms when only about 50% of Americans support stricter regulation of firearms (compared with 85% of Australians during the buy-back scheme in 1996)? Not to mention that unless the flow of illegal firearms being smuggled in from South America and Mexico is somehow curtailed, firearm regulation isn't going to make much of a difference.
I think that America's gun problems are much deeper and broader than legislation can fix. Australia and almost all of the European countries that now have gun control laws still had substantially lower gun homicide rates than America before those laws were introduced. There is also a disconnect between gun ownership levels and gun homicides between European nations and the US. For example, Switzerland has relatively high gun ownership levels but still has substantially lower gun homicide rates than the US. The problem in America seems to be more of a social one than a legal one...