Leapers OPRMR20CTS Op3 Micro SLS Single Dot Black Anodized 1X 4 MOA Red Dot Reticle Precision Machined From 6061-T6 Aluminum And Finished In a Matte Black Anodization. Red 4.0 MOA Single Dot With 8 Brightness Intensity Settings. Manual Or Automatic Dot Brightness Intensity Adjustment Via Surrounding Light Sensor. Side Loading Battery Compartment, No Longer Necessary To Remove Sight And Re-Zero When Replacing Battery. 15,000+ Hours Battery Life at Middle Brightness Setting. Crisp 1 MOA Per Click Adjustment. Large FOV Multi-Coated Glass LensIPX7 Waterproof Rated. Includes Removable Low Profile Picatinny Mounting Base. Mounting Base Interface Uses The Common RMR Footprint. Optic Height Co-witnesses With Most Suppressor Height Iron Sights. Tertiary Aiming Point Laser Engraved On Rear Face Of Optic Hood. Compatible With Most Optics Ready Pistol Systems Magnification: 1X Length: 1.78" Weight: 1.20 Oz Battery Size: Cr2032 3V Reticle: 4 MOA Red Dot Proofs: IPX7 Waterproof Optic Coating: Multi Coated