The SCRS-GR (Solar Charging Rifle Sight) advances Holosuns SCS technology creating an all-new ultra compact 20mm tube sight designed for long gun applications. SCRS-GR features light sensors and an advanced Auto Mode for automatic reticle intensity settings and Manual Mode for manual control of dot intensity. SCRS-GR 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-GR is available with a 2MOA dot only or Holosuns MRS (Multi-Reticle System). SCRS-GR features 12 reticle intensity settings four of which are compatible with night vision devices and up to 50k hour battery life. IP67 waterproof.