Vortex Optics Sport Cantilever 30mm Ring - Absolute Co-Witness - 1" Offset

Manufactured by Vortex Optics
SKU: CM-305
MPN: CM-305
Manufactured by Vortex Optics
4 Reviews

In Stock

Standard orders will ship out 2 business days if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The Vortex Optics Sport Cantilever 30mm Ring provides extra rail space for back up iron sights when using the StrikeFire red dot along with the VMX-3T magnifier. The cantilever ring moves the StrikeFire forward about one inch. This ring provides an absolute co-witness mounting height of 1.46”. Works with most 30 mm red dot sights.
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BrandVortex Optics
Mount HeightAbsolute - 1.46 in
Optic Type30mm
PlatformM1913 Picatinny

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

4 reviews

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As advertised


Fast shipping, and it all came in one piece. Never an issue with Primary Arms or Vortex Optics

Mount is a bit high, but ok


I bought the Vortex XBR scope and this ring setup is works great for the short scope rail on my crossbow.

Works like it should


I bought this ring to go with the other Vortex AR15 30mm Ring for Absolute Co-Witness. They mated up exactly on my AR and fit the PA 1-6X 30MM scope perfectly. I chose rings over a 1-piece mount to give me more flexibility when mounting and it did. I got the eye relief perfect for me. I'd recommend this combo to anyone. Update, I bought two of these.



Would bye again get co wittiness mount