The Holosun SCRS RD 2 is an ultra-compact 20mm tube sight designed specifically for long gun applications featuring advanced solar charging technology. Crafted from durable 7075 aluminum this optic is lightweight at only 2.45 oz and includes a lower 1/3 co-witness 1.63-inch mount with compatibility for third-party offset RDS mounts using Holosun's 509T footprint. It offers a 2 MOA red dot reticle with 12 intensity settings including four night vision-compatible options and an impressive battery life of up to 50 000 hours powered by an internal rechargeable battery.The SCRS RD 2 incorporates multi-directional light sensors for automatic reticle brightness adjustment along with a manual mode for customized intensity control. It is IP67 waterproof has unlimited eye relief and features fully multi-coated optics for superior clarity. Windage and elevation adjustments are precise and intuitive with a 1.0 MOA adjustment size. Compact and versatile the Holosun SCRS RD 2 is an excellent choice for shooters seeking a reliable and innovative red dot optic.