Why would the insurgents have access to special operations russian weapons?
Same goes for security.
There are a lot more guns, that'd be amazing in this game. Since we have bullet penetration, we could make use of a .50 cal sniper rifle, like the M82 Barrett. It should give an instant kill through anything, since on impact, the bullets "blows up" the concrete or whatever wall there is, resulting in several sharpnels.
That's just one out of a dozen, I'd also like to see.