TexasCHLforum.com

And it's not only a great tool for demonstrating how a Glock operates, but it's also fantastic in helping to explain to another how a semiautomatic pistol works in general as well, especially since you can remove or view cut-aways of many of the components.

I spent more than a few minutes attempting to figure out how to save his Shockwave animation to my hard drive for reference, but gave up... I just hope his site doesn't go away!