Well I know a lot of handgun calibers: But not 7mm.
There is the antiquated 7.65×21mm Parabellum which I believe is not chambered in any firearms anymore. And the .32 ACP which is a 7.65 caliber in a metric configuration. 7.65 (.32)is only chambered in small backup guns as is .380, though .380 is used by police in Europe as a main carry pistol.
I have no idea what they can actually be carrying.
Honestly I probably know less about the multitude of different sidearms available than you do, or what they carry, I was just relating what I heard on the radio this morning. The mag7 sounds correct, but I can't check on it right now.