There are a lot of flaws with the game, the recoil being one of them. At first I thought it was DoD-like where your crosshair moves up when shooting and you counteract this by pulling your aim down. However, the recoil in FAS is all over the place. At first it goes up just like DoD, but then it comes down and back up in random intervals without even controlling it. Basically it does what it wants and there's little you can do. The upside to this is that the recoil is pretty minor and full auto is generally accurate for most of the distances you encounter in this game.