Blackcat Airsoft 25/30 mm Bubble Level with Angle Indicator (Left)

Blackcat Airsoft 25/30 mm Bubble Level with Angle Indicator (Left) The red needle moves with your rifle and displays a number that indicates the percent your rifle is off level Multiply the indicated percent by the target distance to easily calculate the adjusted distance for gravity. The bubble level which can be flipped to the side also allows you to have an additional indicator to achieve much higher accuracy. Fit for any scope of 25mm / 30mm diameter Design For Left Hand User