This RMSC red dot sight has a lens window just 16mm tall and 21mm wide that provides unlimited eye relief and parallax-free aiming out to 33 yards. Choose from a red or green 3 MOA dot with eight daytime brightness settings and two night vision compatible settings. Windage and elevation each offer 45 MOA of adjustment at 1 MOA per click for a total of 90 MOA. Install on slides pre-drilled for the RMSC or Holosun K pattern or using the included low-profile 1913 Picatinny mount. Built with 7075-T6 aluminum alloy, this sight is shockproof and IPX7 waterproof to take on field conditions encountered in the real world. To extend the battery life, the Judge enters a power-saving mode after 225 seconds of inactivity but activates in milliseconds thanks to shake-to-awake technology that senses when the sight is bumped or moved. Powered by a single CR-2032 3V lithium battery, you can expect 40,000 hours of continuous operation and up to 50,000 real-world hours thanks to built-in efficiency features. Measures just 41mm x 25mm x 24mm (LxWxH) and weighs 1.7 ounces with the battery installed. We stand behind our reflex sights with a lifetime warranty against everything short of intentional damage. If it stops working for any other reason, Gideon Optics will replace it.   What’s in the box: 1913 picatinny rail mount and screws T10 tool Adjustment tool Sealing plate Cleaning cloth One pair each of the following mounting screws(recommended torque for slide mounting is 12 inch-pounds): M4 x 0.7 x 10mm M4 x 0.7 x 8.6mm M3.5 x 0.7 x 10mm M3 x 0.5 x 12mm