Provides extra rail room for rear Back Up Iron Sights (BUIS) when using the StrikeFire red dot along with the VMX-3T magnifier. The cantilever ring will move the StrikeFire forward about one inch.
NOTE: The lower 1/3 co-witness mounting provides a height of 40 mm. The lower absolute co-witness mounting provides a height of 37 mm. Will work with most 30 mm red dot sights.
|Outside Diameter (inches):||2.4 - 2.6 inches|
|Outside Diameter (mm):||62-66 mm|