I live in one of the most dangerous cities in the country, St. Louis MO. The other cities that rival it in how dangerous it is are Flint Michigan and Detroit, usually the 3 round out the top 3 for most violent crime in a city. The gun with the shortest period of time between when it is bought brand new, and when it is confiscated by police due to use in a gun crime is the Hi-point C9, about a year. This is a firearm that is cheap, around $150, and a semi-automatic, chambered in 9mm. Other popular guns are .38 revolvers, usually small, concealable, and cheap is what constitutes most guns confiscated by police because of use in a gun crime. For that matter, AR15's, AK47's and most semi-automatic rifles only constitute around 1% of gun deaths in this country. While those make the news the most, they are among the least likely weapons to be used in a gun death. I see so many gun articles considering which gun is right for you, for self defense, but I rarely see anything discussing what weapon is likely to be used against you. This should be one of the most crucial factors when making a purchasing decision for a firearm to be used in a self-defense scenario, what is the perpetrator likely to be using? Obviously you would want a firearm that is superior in most categories to thwart the criminal. Another article I read discussing this topic involved a police detective who did a more thorough categorization of the fire arms to cross his desk, and found a lot of the guns didn't even work for that matter, or stove piped/jammed after 1-3 round was put through it and well before it could exhaust its magazine. Most police departments only categorize a firearm used in a crime under Rifle, Shotgun or handgun categories, with no additional information on what type of firearm or it was, what round it was chambered for, etc. etc. I personally believe this is because most gun crime is in low income neighborhoods, where the best weaponry and equipment is very hard to come by, and so bargain brand firearms like the Hi-point C9 are considered the weapon of choice. The TEC-9 use to be a very popular gun amongst criminals, not sure where it ranks today. It was not very accurate, but could house a large capacity magazine, and was lowly priced. Older versions of the weapons could easily be converted to be fully automatic. The most famous crime this weapon was used in was the Columbine shooting, which was a testament to its low dollar nature, since high school students could afford it. I think the studying of what guns you're likely to run into when you find yourself in a situation where the assailant has a gun shouldn't be as overlooked as much as it seems to have been.