Shrewd Optum 40/35mm Ring System Diameter:.019 • Length: 98mm (3

• Length: 98mm (3

Full side zips allow you to easily step in the bib with boots on

Makes changing springs to modify the trigger tension a breeze

Supports up to 32GB SD Card (not included)

Width Cocked / Uncocked: 21

Shrewd Optum 40/35mm Ring System Diameter:.019 • Length: 98mm (3Optum Ring system (O. R. S.) for the 35mm and 40mm Optum scope This must be used in conjunction with an Optum scope Makes it possible for shooters to change pin positions, fiber color, or fiber size by swapping between multiple rings in seconds Features exterior fiber wrap that captures ambient light for a brighter pin Adjustable fiber cover allows precise control over fiber brightness Two 8 32 holes for installing a light in seconds Eight pin