What do you mean by pressing the gun?

Pressing the gun is controlling the gun.

When the machine gun fires repeatedly, the sight and trajectory will be pulled up and moved left and right due to the recoil. At this time, the recoil force is controlled in the opposite direction (move the mouse down, left and right) so that the bullet will not deviate from the target. Shooting and pressing the gun is the king of machine gun play. In fact, compared with gun pressing, the technical requirements are higher. If you don't practice well, it won't work. It's basically invincible.

Pressure gun source:

Pressing the gun is an operation skill of the source game of crossing the line of fire. Pressing the gun refers to using the mouse to force the aiming of the gun to adjust downwards in the process of continuous shooting or strafing, so as to offset the upward movement of the aiming caused by recoil, thus making the shooting more accurate.

In the game, when aiming at a person to shoot, generally speaking, if a rifle is used, it will always hit. In fact, it is very difficult to hit a person like this. If you want to hit someone, you'd better adjust the sight of the gun at any time, because even if you aim at the other person, after shooting, the sight will shift upwards due to the recoil of the gun, so it is necessary to readjust the sight of the gun.