Aiming

 

Press 'L' key and click on your target. If the soldier is looking in different direction he will turn to selected target first. The required APs for turning are shown in white.

Press 'L' key one more time and APs will become red. This is amount of APs you need to ready the gun. Now when you click on some spot the soldier will target it. When you shoot to the targeted spot no APs will be charged for readying the gun.

 

When your gun is equipped with some sort of optics the soldier will use them. The sight range will increase according to the scope bonus. In the same time the field of view will decrease.