A lot of people think that the guns should recoil more than they do. Most of these people have no idea what recoil is like on these weapons as they've never fired them, or even their civilian legal equivalents. They can't seem to grasp that some weapons don't recoil that much. The M4 carbine for example doesn't recoil all that much. The P90 recoils even less. I wouldn't say the recoil in the game is spot on or anything, but it is actually relatively close in some cases.
With that said, these weapons aren't accurately portrayed in most cases. What's usually wrong is the balance of the weapons. Ammunition capacities are off in some cases as well. Accuracy is screwy, etc.
Thank you Mr. Dan. This is spot on right here. If you guys need more realism in your military games there are sims out like Arma and Flashpoint. This game isn't meant to be like that if you couldn't tell. I mean predator missiles can't blow up a gas station, 100mm rounds can't damage a farm, exploding fuel tanks don't damage a juggernaught, and so on and so forth. Its a game. Have fun with it.