Take the ak for exemple, the front sight is like 4 centimeters above the barrel, how is that accurate? Do you just have to compensate for that? Also aplies to scopes, some of the sight quite high on the gun
Edit: i already know they make arcs because of gravity and the angle of the barrel
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The sight is angled slightly to compensate for that.
Even if the sight was literally in the barrel looking through a transparent bullet, you would still need to point the gun slightly up to shoot something far away. Gravity would pull the bullet down.
So people will adjust the sight so it compensates for both the offset and the gravity so the sight lines up with where the bullet will go at a certain range.
You ever play a shooter game with a sniper rifle?
Notice how there’s usually a lot of horizontal lines or notches or stuff?
Those are the lines on where you should aim. You guess how far the target is, then use the appropriate line to shoot.
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