Below is a link to an excellent, common sense video. This video should go viral.
To summarize: In the US violent crime is down 50% and the murder rate is down over 54% in the last 20 years. England with gun control actually has a violent crime rate 3.5 times that of the US. The bulk of US violent crime occurs in very small pockets in large metropolitan areas. In 2011, of the homicides involving firearms, only 3.5% of those homicides involved "rifles", and the AR15 is a subset of the "rifle" group. If politicians want to solve violent crime in those metropolitan areas they need to “put on their boots, and go to those neighborhoods and figure out how to improve the poverty level, how to create jobs and how to improve the education system”.