The scrs-rd (solar charging rifle sight) advances holosuns 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 holosuns 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.Battery: Internal Rechargeable BatteryMagnification: 1xObjective: 20mmEye Relief: UnlimitedDot Size: 2 MOA Dot/ 65 MOA CircleTube Diameter: 20 MMLength: 1.70"Weight: 2.45 ozReticle: 2 MOA Red Dot/65 MOA Red Circle Multi ReticleAdjustment Size: 1.0 MOAProofs: IP67 WaterproofOptic Coating: Multi-CoatedWindage Elevation: Adjustable