I guess that would be interesting for variety.
Modern military forces haven't really used revolvers in over a decade though - they simply offer no advantages and a ton of disadvantages when compared to modern semi-auto pistols. It'd make the most sense on the Insurgent side.
@cyoce Strange post to kind of bump, but fuck it.
It's not that the primary weapons are weak, because they aren't really. Basically every gun in the game does basically the exact same damage.
You also happen to be shooting at some kind of ex-bodybuilder who can take a .308 round from a SCAR-H without armor and survive.