Just to clarify...
There is a large difference between assault rifles and assault weapons. Having an unregistered "assult "rifle" in your pocession without a permit and license will get you 10 years in the federal pen!
The ONLY difference in an assault weapon and semiautomatic is the number of rounds the magazine will hold. As mentioned, in trained hands, the size of the magazine means little. That was also shown true in the last “assault weapons ban” in 1994 that expired in 2004. High capicity magazines are the largest problem Which, is probably the only thing that will happen again due to the recent “massacre” so publicized that is being highly publicized for both monetary and political gains.
Worldwide, the U.S. does have more shootings than some countries, less than others per capita. However, you will find if one removes the wars and other outside influences, the U.S. has very few “mass murders” and/or “massacres” in relationship to the world with the use of guns. One doesn’t have to look hard to prove that – just think of all the dictators that banned their populations from the right to bear arms starting say with a guy named - Hitler.