LUCID Red Dot Cast aluminum frame Imported Parallax Free Lower 1/3 Co-Witness Picatinny Rail Mount Built in 100% Waterproof Fogproof and Shockproof tested to 458 SOCOM 4 Operator Selectable Reticles with Capped 1/2 MOA Adjustments Reticle Auto Brightness Sensorwith Auto Shut Off after 2 hours