Phenixtri has written
Yea the mod is intended to be on the latest version of the source engine and yes there will be iron sights as well as 3D dynamic optics "scopes" as shown in Smod Tactical 5.56 mod.
As for the SEAL teams it can be really any of the teams since they do not carry any distinct markings and the player models themselves will be customizable in terms or uniform and gear.
Some player models will even be able to be either male or female player models. For example Spetznaz actually has female members in real life.
As for the CS2D weapons I am still thinking about that but it would be a pretty cool way to pay homage "credit" to CS2D :3