Dead Ringer DR4821 Green Dot Sight with 4 Different Adjustable Reticles 1X magnification; Fog proof, shockproof Matte Black finish; Windage, elevation adjustments; 5/8" diam. Tube F.O.V. at 100 yds. is 51.84'; 4.5 ozs Green Illuminated Reticles, 4-Reticle Choices for Quick Target Acquisition