I did forget to mention something as my experience in selling firearms. The 400+ firearms I sold in a ten year period, happened mostly after there was even a hint of gun controls. During President Obama's two election terms and Sandy Hook Massacre. I spent most of my time approving fire arm sells during my shift.
For example in 2005 I probably sold a total of 16 guns for the whole year and the store itself probably sold around 200. This is in a very rural area of Florida and what was sold were your shotguns mostly and hunting rifles. I never sold handguns and the company only sales handguns in Alaska for bear protection.
On December 15th the day after the massacre, I personally sold 30 firearms that day and that was limited because I was waiting for background checks. The state of Florida was overwhelm with background checks. Additionally in 2005 we didn't sell assault rifles (AR-15). In 2011 we started to sale them as there was a great demand. In December 15th, 16th, and 17th we sold out of our entire inventory of AR-15 style guns (117). For five months we would have customers camp our sporting goods department starting at 3am waiting for FedEx to arrive. We never knew what we would get and sometimes we wouldn't get any guns, but that didn't stop people from waiting.
One of the main reason for the rush was because people were taking these same guns and selling them for 3x time amount. A colt AR-15 that we sold for $1050 was selling at gun shows or private sell for $3,000. Our cheapest AR-15 type rifle was around $598 and it was being resold for nearly $1,500. The same thing was happening with popular ammo .22, 9mm, ect... Then when people realized that our government would do nothing the hysteria died, with the exception of ammo. I still can't find .22 anywhere.
The gun manufacturers love gun debate and they love when people begin shouting gun control. Their profits soar. That Bushmaster that was used in Sandy Hook Massacre was from Remington and sold at places like Walmart.
http://www.huffingtonpost.com/2013/12/13/sandy-hook-gun-profits_n_4442034.html