It's basically the same, just with a lot more of a "good enough" attitude to aiming. So you really mostly on a muscle memory to have pistol somewhere in a target, then aim using iron sights. For whole 8,6 or 4s you focus vision on a iron sights. During the first phase - moving your arm up from the 45 degree position, you look in the target direction so you know when to start, then focus your vision on iron sights in the end phase of raising arm motion so you are almost immediately ready to aim and pull the trigger, then just move you eyes to the next target, but with "locked" focus (at the distance of iron sights, not target), so again, arm moves to the target area and you can aim and shoot.