The improved IVCB-6L (Infinitely Variable Centrifugal Brake) braking system offers complete control for any situation and even more adjustment and castability with additional locking brake modules

it is possible to make 0

A must have

Each ring set includes one set of the +/- 0 MOA concentric

Burris 420162 XTR Rings 0.5" Medium 30mm Diameter 1 Pair Matte Blk Brand_All Star Sports The improved IVCB-6L (Infinitely VariableDescription Burris 420162 XTR Rings 0. 5" Medium 30mm Diameter 1 Pair Matte Black New XTR Signature Rings were designed for the tactical shooter. They deliver plenty of holding power, with less weight. Each ring set includes one set of the + 0 MOA concentric, one set each of the + 5 MOA and + 10 MOA, and two sets of the + 20 MOA. With these inserts, it is possible to make 0, 5, 10, 15, 20, 25, 30 or 40 MOA of cant in the scope mount. Features: Unique,