EOTech HWS EXPS3 HD Holographic Red Dot Sight 68 MOA Ring/1 MOA Dot Black. Featuring a left-side rotary dial adaptive auto-brightness and shake-awake technology it delivers intuitive control without sacrificing magnifier compatibility. Housed in durable all-aluminum construction the EXPS3 HD maintains EOTECH's proven reliability with a 1.74in centerline height for a lower 1/3 co-witness. A modern evolution of a legendary optic. 0-RETICLE The 68 MOA speed ring with a 1 MOA dot enables fast target acquisition and provides three aiming points calibrated for .223 Cal. 62 Gr. 2900 Vel. Other calibers can be used by determining the ranges. With shotguns the ring approximates shot patterns which vary based on choke and shell type. Specifications for EOTech HWS EXPS3 HD Holographic Red Dot Sight: Manufacturer: EOTech Color: Black Fabric/Material: Alluminum Reticle: 68 MOA Ring and 1 MOA Dot Illumination Type: Laser Diode Illumination Color: Red Eye Relief: Unlimited Adjustment Click Value: 0.5 MOA Emitter Type: Enclosed Battery Type: Lithium Metal CR123 Battery Quantity: 1 Battery Life: 1000 hours Operating Temperature: -40 - 140 Fahrenheit Water Resistant Mark: 33 ft 10 m Length: 3.54 in Width: 2.23 in Height: 2.72 in Weight: 11.6 oz Mount Type: Weaver Package Type: Box Features of EOTech HWS EXPS3 HD Holographic Red Dot Sight SIDE ROTARY DIAL - Intuitive controls that stay clear of magnifiers and accessories ALL-ALUMINUM- All-aluminum hoodless design maximizes peripheral awareness for faster more natural target acquisition SHAKE-AWAKE - Always ready with intelligent brightness that adjusts to your environment Package Contents: EOTech HWS EXPS3 HD Holographic Red Dot Sight CR123 Battery Quick Start Guide EOTech EXPS3HD-0: HWS EXPS3 HD Holographic Red Dot Sight 68 MOA Ring/1 MOA dot Black