Vortex Sport Cantilever 30mm Ring Absolute Co-Witness
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: Provides absolute co-witness mounting height of 37 mm. Will work with most 30 mm red dot sights.
Weight: 6.7 oz
Outside Diameter (inches): 2.4 - 2.6 inches
Outside Diameter (mm): 62-66 mm