Shrewd Optum Ring System

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Designed to be used with 35mm and 40mm Optum scopes. The new O.R.S. by Shrewd makes it possible for shooters to change pin position, fiber color, size and more. Swap between multip le rings quickly without the hassle or need for tools. Pin variants of the ring system include everything you need for full customization. Specifications Includes Pin and Fiber (not included in no pin version) Includes Blue, Orange and Green Fiber, mounting screws, and adjustable fiber cover Two 8-32 holes for mounting Eight Pin Positions May be used with 40mm Sunshades Pin helps lock down keyway for a secure fit with no rattling Made in the USA Show more