In the past, when shooting, the requirement was to form a line of three points, that is, the target of the gun's target hole, sight, and target should be connected in a line, so as to accurately hit the target. The sight on the sniper gun is now a large block higher than the barrel, and it is not on the same reference line as the barrel. Can we hit the target with this aim? Don't worry, the answer is yes.

Why can a bullet accurately hit the target in the center of the crosshairs in the sight when the barrel and sight are not on the same reference line? How does a firearm that uses mechanical aiming hit the target when the barrel and sight are far apart? The principle is as follows.

When a bullet is fired, its flight trajectory is not a straight line, but a parabolic line, which is influenced by many factors, such as air resistance and the weight of the bullet. So, to hit the target, you need to know how far away you are from the target, so that you can calculate the impact point of this parabola to the target.

What is the impact point? When a bullet is first fired, its flight trajectory is above the line of sight. When it reaches the target, it begins to fall to the position you are aiming at, which is the point of impact.

The optical sights and mechanical sights are parallel to the axis of the barrel, and there is no visible trace with the naked eye. In fact, the optical sight is not fixed inside, and can be adjusted up, down, right, and right through vertical and horizontal knobs, which is called calibration. This is a necessary step to counteract factors such as wind deviation and ballistic descent. So when shooting, snipers need to master how to calculate wind direction and speed, as well as humidity and distance.

The calibration of mechanical aiming is simpler than optical aiming. Generally, the effective distance for ordinary rifle shooting is between 400 meters and 600 meters, and the balance and trajectory of the target can be calibrated without the use of optical aiming equipment. This is the scale.