LUCID OPTICS is proud to offer the world's first variable magnifier for red dot sights. This high quality optic offers crystal clear optical performance, and maintains an expansive field of view with a comfortable eye relief through the entire magnification range. \n \n* Fully Multi-Coated Lenses \n* 100% Shockproof & Waterproof \n* 100% Fogproof \n* 2x - 5x Magnification \n* 30mm Tube \n* Objective Lens: 21mm \n* Adjustable Dot Centering \n* Weight: 7.75oz \n* FOV @ 100yds - 40ft - 25.5ft \n* Eye Relief: 4" \n* Compatible with ANY Red Dot \n* Limited Lifetime Warranty