Rock 1x22mm Circle Dot Reflex Sight. A compact open-emitter optic with a crisp 3 MOA center dot, motion activation, top-loading battery access and flexible mounting options. Up to rated battery life. Built for Fast Sight Pictures. Compact size, clear aiming reference. The Rock uses a 15.5 × 22 mm lens window with unlimited eye relief. The outer circle supports quick acquisition, while the 3 MOA center dot provides a defined aiming point. View the reticle from a comfortable shooting position without a fixed eye-relief distance. Designed for parallax-free operation beyond approximately 33 yards when properly zeroed. Choose red or green illumination. This listing supports red and green circle-dot variants. Both use a 3 MOA center dot and the same compact Rock housing. Select the desired illumination color from the listing variation menu before checkout. Adjust for daylight and low-light use. Ten user-adjustable brightness levels provide control over reticle intensity. Eight settings are intended for normal visible-light use, while two lower settings are night-vision compatible. Side-mounted up and down controls. Eight visible-light brightness levels. Retains the previously selected brightness after waking. Always Ready, Easy to Maintain. Motion activation with top-loading battery access. After approximately 225 seconds without movement, the reticle enters a low-power state. Movement immediately wakes the optic and restores the previously selected brightness. The top-opening CR1632 compartment allows battery replacement without removing the sight from its mount, helping preserve the established zero. Inactivity triggers the energy-saving state after approximately three minutes and 45 seconds. Replace the battery from the top without removing the optic from the mounting surface. Direct footprint or included rail mount. The Rock is ready for compatible RMR-pattern mounting surfaces and also includes a low-profile 1913 Picatinny rail mount. Multiple screw pairs are supplied for compatible mounting applications. Low-profile 1913 Picatinny mount included. Recommended slide-mounting torque: 12 in-lb. Confirm screw thread and length before installation. Lightweight 7075-T6 aluminum construction. The compact aluminum-alloy housing balances low weight with protection for the lens and emitter. The optic is rated IPX7 water-resistant and designed to withstand shock from normal compatible use. Approximate weight with battery: 1.5 oz. 15.5 mm tall × 22 mm wide. Circle dot with 3 MOA center dot. Red or green; select from the listing variation menu. 10 levels: 8 visible-light and 2 night-vision-compatible. One CR1632 3V lithium battery. Automatic low-power mode after approximately 225 seconds of inactivity. Up to 50,000 hours, depending on brightness and usage. RMR-pattern footprint; low-profile 1913 Picatinny mount included. 45 × 32 × 26.4 mm; 9.8 mm deck height. Approximately 1.5 oz with battery installed. Gideon Optics Rock reflex sight. Low-profile 1913 Picatinny rail mount and screws. One pair of 6-32 × 0.374 in mounting screws. One pair of 4-40 × 0.25 in mounting screws. One pair of M3.5 × 0.6 × 11 mm mounting screws. Confirm the selected illumination color, mounting footprint, screw thread and screw length before installation. Packaging appearance may vary by production batch. Installation & Safety Notes. Read the product manual before installation or use. Confirm that the firearm is unloaded and remove all ammunition from the work area before mounting or adjusting the optic. Do not look directly at the sun through the optic. Do not over-tighten the battery cap or mounting screws. Firearms and other accessories shown for demonstration are not included.