I have never been in the CIA, however the frontline employee is called an Intelligence Officer. In most applications, his job is to cultivate intelligence sources. I can't imagine one carrying any weapon except in extreme circumstances. They are expected to comport themselves as gentlemen and diplomats.

There are the Paramilitary folks who carry whatever is locally available. If you were doing somthing deniable, you would likely be carrying gear made in any country but the USA.

Paramilitary folks in SE Asia zipped around sporting Swedish Ks submachine guns and FN HPs.

PMs in Afganistan are carrying Glocks and AKs.

There are also uniformed CIA security guards at CIA facilities in the US. If they are carrying Berettas(for example) you could expect to find a gun show exhibitor selling "genuine CIA Berettas"(from CDNN, of course).

From my too many years as a bartender, I don't believe any war stories. I have heard too many BS stories from wannabe heroes.