This Weaver-style low-rise mounted red dot sight has eight brightness settings; point source LED creates a clean beam that produces a solid red dot while still having a long-lasting battery life. The Bushnell RSX-100 Reflex Sight also has a side-loading battery that is easy to replace without removing the red dot sight so that you can retain your zero. Add these Red Dot Sights to all of your pistol ARs and shotguns! Shop Bushnell RSX-100 Reflex Sight on OpticsPlanet! Specifications for Bushnell RSX-100 Reflex Sight: Manufacturer: Bushnell Color: Black Finish: Matte Fabric/Material: Aluminum Magnification: 1 x Objective Window Size: 25 mm Reticle: Red Dot Illumination Color: Red Brightness Settings: 8 Adjustment Type: MOA Adjustment Click Value: 1 MOA Emitter Type: Open Battery Type: CR2032 Battery Quantity: 1 Length: 6.45 in Weight: 1.4 oz Condition: New Magnification Type: Fixed Attachment/Mount Type: Weaver Features of Bushnell RSX-100 Reflex SightBright 4 MOA Dot with Exceptional Battery LifeVersatile Design Mounts on Pistols, Rifles and ShotgunsDurable Aluminum ConstructionOptimized Hood Design and Visibility Package Contents: Bushnell Reflex Sight Rsx-100 4moa W/weaver Low Rise Mount