While I pack either a Glock 26 or Smith J I can say there are a few ex-military guns I'd feel totaly fine staking my life on.
1. Makarov's in 9x18. I have a pair and they are excellent.
2. SIG P6 9x19. Excellent to. If its an older one that don't feed JHPs well, then use powerball or Federals EFMJ.
3. Argentina FM High Powers. Like the P6, there are options if it don't feed JHPs well.
4. CZ 82 in 9x18. Like the Mak they work very well.
5. 1917 Colt or Smith .45 ACPs. BIG but they work!!!
Most WW1 or WW2 guns, excepting the 1917s. I'd just pick up. But such as 1911s or Beretta 34s can be used. The Enfield and Webbly, at lest in .38 S&W, are awfully weak as a defensive gun in power. .455 is ok but a very slow round. And the P35 Random is, well, an awful big 9mm!
6. P64. Yea once you get past the super hard DA pull, it's a nice little pocket pistol and would work.
7. P83. Yes I've seen the Polish P83 and handled them but never shot one. But it handles very well! I'd say it should do.
8. Astra 400/600. Yes it wil work but I dunno about JHPs at all! I'd change the springs in it, like in any WW2 gun, before I'd pack it.
9. Star B 9mm. These 1911 style pistols work very well if you can find one! But probably feeds only FMJ.
There are others but these above I have mostly shot and owned, except the P83.
Deaf