Sure, you’ve heard of imdb, the Internet Movie Database.
But have you ever heard of imFdb? The Internet Movie Firearms Database?
See, the “F” stands for “Firearms”.
If you ever watched a movie and thought, “hey, what kind of gun did Rambo use?” this would be your first best resource. Unlike, say, the bajillions of other sites that would come up in a Google search, the imfdb focuses on guns.