Mouse acceleration/smoothing ?

Is this game using mouse acceleration instead of raw input?

I feel like whatever settings I'm using in game, I can't get a precise aim, even with lower sensitivity settings. Zowie EC2-A, 800 DPI.

I heard someone said, that you can disable mouse acceleration from an .ini file, where I can find that?

C:\Users\ [user] \AppData\Local\Insurgency\Saved\Config\WindowsClient\GameUserSettings.ini


Also disable VSync if you're still having problems since it can cause some input lag.