Includes: Lower 1/3 Cowitness Mount T10 L Key Rubber Cover User Manual CR2032 Battery Lens Cloth The SCRS-RD (Solar Charging Rifle Sight) advances Holosun's SCS technology creating an all-new, ultra compact 20mm tube sight designed for long gun applications. SCRS-RD features multi-directional light sensors and an advanced Auto Mode for automatic reticle intensity settings and Manual Mode for manual control of dot intensity. SCRS-RD is made from 7075 aluminum and includes a lower 1/3 co-witness, 1.63'' mount that utilizes Holosuns proven 509T footprint for compatibility with third-party offset RDS mounts. SCRS-RD is available with a 2MOA dot only or Holosun's MRS (Multi-Reticle System). SCRS-RD features 12 reticle intensity settings, four of which are compatible with night vision devices and up to 50k hour battery life.