NIGHTFORCE X-Treme Duty 30mm 4 Screw Top Half of Ring With Level (A128)

Nightforce Top Ring Bubble Level is designed only for Nightforce Unimount Direct Mount or Steel Rings. Stop guessing about how level your weapon is when taking the shot of a lifetime. Without a level it is pointless making tons of calculations for a long range shot. Having a level weapon is essential for the accuracy necessary for super long range shots.