This first post is mostly going to be covering some sources that I use to research firearms and firearms statistics, as well as some entertaining, yet very informational Youtube channels that I am subscribed to. There are many firearms channels on YouTube that make great sources of information, and they also tell you the sources where they get their information as well, so you can always double check it. The YouTube channel that I probably find to be the most informative and non-biased across virtually any topic of firearms that you can imagine is hickcok45. Here is a video he did on gun safety a few years ago.
Another YouTuber who I consider to be along the same lines as hickok45 is Military Arms Channel. He is very informative and acts as a voice of reason on the politics side of firearms and calls out gun owners when they are not doing the right thing. If you are interested in checking out firearms ballistics, then there is no better place to look than tnoutdoors9. Some other fun YouTube channels that make very entertaining, as well as informative videos are faliaphotography, iraqveteran8888, Funker Tactical, and one that a lot of people probably heard of, FPSRussia. I would recommend him more for entertainment, but he can be informative as well sometimes.
Now, onto some more concrete sources of information. In the abstract, government bureaus and agencies make great sources of information and have accurate, unbiased statistics. I find this especially true when it comes to firearms. One of the websites I look at a lot is the ATF (Federal Bureau of Alcohol, Tobacco, Firearms and Explosives) www.atf.gov. And their statistics page ATF Statistics. Other government websites include The National Institute of Justice, the Bureau of Justice Statistics, and the Federal Bureau of Investigation. I may use other websites that are deemed credible along the way, and I will always post a link to wherever I get my information from.
I also know a lot of the technical information about firearms from years of learning and experience, manufacturer websites, and also this great book called The Illustrated Encyclopedia of Guns that I find very helpful.