A bubble level for firearms is a measuring tool that shows the level or tilt of the firearm during a shot.

A precision weapon shooter, before hitting a target at long distances, focuses on precise aiming, the position of the rifle and body, breathing, wind changes, and other factors that will significantly affect the accuracy of the shot. Even slight deviations of the rifle from the horizontal level can lead to a miss. By using a bubble level on the Picatinny rail, the shooter can ensure that their rifle is set level and eliminate the possibility of errors caused by tilt.

One of the main advantages of having a level for controlling the tilt of the weapon, besides increasing shooting accuracy, is the improvement of the shooter's overall performance; by eliminating the problem of rifle tilt, the shooter can focus on making an accurate shot.

Level on the scope tube
 Level on the LV-03 sight tube