Monstrum Level Bubble Products are built to check for proper vertical alignment of your rifle
Imperfect vertical alignment of your scope when shooting introduces scope cant error - horizontal drift of your shots due to cant - An anti-cant level bubble corrects for this issue, allowing you to quickly check for proper alignment of your rifle before each shot.
The level bubble attaches to your picatinny rail with a low profile design that slots in at the base of your of your rifle scope
WARNING: Level bubble that mounts to the rear of a rifle scope, between the scope and the rifle. Requires greater than 0.5 inches of clearance between your scope eyepiece and mounting platform for installation. Not compatible with low profile rings, mounts, or scope setups.
All Monstrum optics and accessory products come with a lifetime guarantee