I'm a new f3 fan that is considering buying this game. I must however know how they handled the iron sights. This is how I think they work:

Your bullets go where the iron sights are pointing, with spread being dictated by the weapon itself. The guns skill directly affects the swaying of said iron sights which makes aiming more difficult.

Is this correct?

Also, is it true that the game is very linear? The few youtube vids I watched seemed to indicate that the game has vast open areas a la f3.

Thanks!

Iron sights work just fine and are accurate, although I shoot in 3rd person and rarely use the iron sights. The environment is very rich but mostly civilized, so it isn't as wild and dangerous as the Capital Wasteland.

There are a ton of amazing mods that make this game have much more luster. And no, the game isn't linear. There are so many things that you can do to change the ending of the game.