Sightron SIII10 50x60mm Tactical Elevation Knob 19 MOA Black MOA

Sightron SIII10 50x60mm Tactical Elevation Knob 19 MOA Black MOA. The full knob rotates with the knob depressed to fully re-adjust travel. Once set depress to rotate to your "lock-in" position to re-set to zero each time. Return to zero after re-adjustment is easily accomplished by turret indexing. The engraved mark shows that the knob has been re-indexed to zero and that the knob has a pre-drilled cross-hatch to aid in recognition of zero. The etched mark also allows you to easily calculate and