Scope level attaches to the scope tube to give the shooter a visual verification that the rifle is dead level before each shot;This helps eliminate inconsistent grouping that results from inadvertently canting the gun;This normally isnt noticeable at shorter ranges, but can have a significant negative effect on group sizes at long range;Works for both right-and-left-handed shooters;Fix for 30mm tube scope

• Spirit Bubble Level Ring Mount for dia 30mm Tube Scope

Spirit Bubble Level Ring Mount for dia 30mm Tube ScopeArmy Force