Guns can still be recalled.
Naturally putting restrictions on guns wouldn't stop gun crime as well as somehow removing them all from circulation, but many countries have implemented gun laws and regulation that was not once there and the result was people stopped getting shot.
Fun fact about gun laws, other countries have had them too, they work.
but again, culture is a huge difference.
Other countries don't have problems with organized crime on a scale anywhere near that of the US. There are 33,000+ gangs in the country with 1.4 million members as of 2011. Consider that these are mostly concentrated in cities and the problem is even worse.
These people are savages with very little regard for their own lives or the lives of others. All they care about is money and power and many of them won't hesitate to gun down anybody in their way. With the Mexican Cartels inching ever northward, gang related violence in border towns is at an all-time high.
Go to any given city in the US and ask about places to go. Most people that are familiar with an area will say something along the vein of "the city's okay, don't go past Chapel Street, especially at night, the east side of the city is bad."
This advice is given in nearly every large city and the bad areas are mostly gang territory. If an area is too dangerous for the average person to go, it may have something to do with gang violence. Other countries simply don't have a problem at this scale.
Japan has the Yakuza but they tend to keep to themselves and wear suits to cover their tattoos. Here, people will gun down others just for wearing the wrong colors. Compare the Yakuza to the Bloods. Both are scummy organizations but one is actually careful about collateral damage.