Choose Options Compare CZ Shadow 2 Optic Screws $5.00 Replacement screws for our Gen 1 RMR/SRO proprietary CZ Shadow 2 RMR/SRO/507 milling. RMR/SRO and Holosun 507 are NOT the same screw length and are not compatible with each other. *Torque spec: 10-12in/lb (not ft/lb!) Broken screws can result... $5.00 Choose Options Compare