The 30RD-2M is a versatile 30mm Red Dot scope available with both a Dovetail and Weaver mount. With 11 brightness settings this red dot is excellent for both low light and bright light conditions. Specifications for BSA Optics Illuminated Sights 30mm Red Dot with 2 Mounts: Manufacturer: BSA Optics Color: Black Magnification: 1 x Objective Lens Diameter: 30 mm Reticle: 5 MOA Red Dot Illumination Type: LED Illumination Color: Red Brightness Settings: 11 Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 0.5 in at 100 yds Emitter Type: Open Parallax: 100 yds Optical Coating: Multi-Coated Battery Type: CR2032 Water Resistance Level: Waterproof Shockproof: Yes Fogproof: Yes Length: 5.25 in Weight: 8.5 oz Condition: New Magnification Type: Fixed Red Dot Sights-Footprint: Not Applicable Attachment Type: Weaver Mount Type: Weaver Gun Type: Rifle Features of BSA Optics 1x Red Dot Sight w/Mount: Adjustment Graduation (Moa):1/2; Lens Coating: Multicoated; W/e Adjustment Range: 40; Rings / Mount Included: Yes; Ring / Mount Type: Two One Piece Mounts / Dovetail And Weaver; Batteries Required: Yes Package Contents: BSA Optics 1x Red Dot Sight w/Mount Cr2032 Battery