EOTech HHS UNITY I Holographic Red Dot Sight 3x 1-Dot Speed Ring Reticle Black HHS1 FTCU-BLK. Available in either Black or Tan these systems feature a 2.26-inch optical centerline height for improved heads-up shooting posture and situational awareness the FTC OMNI Mount allows the magnifier to stow completely below the optic's sightline for instant obstruction-free target acquisition. Specifications for EOTech HHS UNITY I 3x Holographic Red Dot Sight: Manufacturer: EOTech Fabric/Material: Aluminum Magnification: 1 - 3 x Objective Window Size: 1.20 x 0.85 in Reticle: 68 MOA Ring with 1 MOA Dot Illumination Type: Holographic Illumination Color: Red Brightness Settings: 30 Eye Relief: 2.2 in Adjustment Type: MOA Adjustment Click Value: 0.5 MOA Field of View Angle: 7.3 degrees Parallax: Parallax-free Base/Mount Type: QD Mount Battery Type: Lithium Metal Battery Quantity: 1 Battery Life: 1000 hours Operating Temperature: -40 - 140 Fahrenheit Weather Resistance: Yes Water Resistance Level: Submersible Water Resistant Mark: 33 ft Fogproof: Yes Gun Make: Universal Gun Model: Universal Length: 8.35 in Width: 2.65 in Height: 3.6 in Weight: 26.3 oz Red Dot Sights-Footprint: Not Applicable Package Contents: EOTech HHS UNITY I 3x Holographic Red Dot Sight What firearm models does the manufacturer say EOTech HHS UNITY I 3x Holographic Red Dot Sight is compatible with? The manufacturer suggests that EOTech HHS UNITY I 3x Holographic Red Dot Sight is compatible with UniversalEOTech HHS1 FTCU-BLK: HHS UNITY I Holographic Red Dot Sight 3x 1-Dot Speed Ring Reticle Black