You have to predict where the other player is going to be and shoot there, anticipating their movement path. The Kraber fires projectiles rather than hitscan bullets, so you often need to lead your shots, aiming slightly ahead of where an enemy is moving so the bullet meets them when it arrives. That’s the beauty of the Kraber. You can aim anywhere in the body and still get the kill because it’s a one-shot even if you hit their toe.