Does anyone know what the default gun (that you get at the very beginning of the game) is? (I.E. What is its real-world equivalent?)

Thanks.

Well I'm going to assume you mean the 9mm pistol, and that would be based on the Browning Hi-Power. Here's a link to Browning Hi-Power's wiki page so you can see what I'm talking about: http://en.wikipedia.org/wiki/Browning_Hi-Power