Primary and backup
Primary = S&W 940, a 9mm moon-clip fed REVOLVER. (yup, REVOLVER, that's what I said!)
Backup = Normally a PA-63 in 9x18mm Makarov, but I also carry a 1911 on occasion.
Yes, I know, why the five-shot revolver as a primary and the semi-autos as backups? Because the revolver will always be there. There's many times I just can't make the semi-auto fit into what I'm wearing. The revolver gets into action pretty quick, and if it looks like things aren't going to resolve themselves after five shots, then its time to bring out the other stuff.
- - - Yoda