30mm One Piece Angle Indicator

Feature · 100% avoid CANT · Designed for Real Fire Calibers & Long Range Shooting · 30mm Diameter w/ 1" Adapter · Easy to Use · Air Bubble Level · Angle Indicator on Side · Designed for Real Firearms · Full Metal · See-through Picture Specification · Diameter:30mm with 1" adapter · Overall Length:140mm (5.5 inch) · Ring Gap:55mm (2.1 inch) · Ring Width:26mm (1.0 inch) · Indicator Dia.:30mm (1.2 inch) · Weight:180g (6.3 ounce) · Finish:Black matte · Mount:21mm picatinny · This ADI is calibrated in degrees and cosines give you an instant read out which can enter directly into ballistic software program on your pocket PC or use with a pre-printed angle drop chart to achieve high accurate shooting. · 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 allo