Aimpoint OPMOD Acro 1x16mm Reflex Red Dot Sight 3.5 MOA Dot Reticle Coyote Tan. It features an enclosed optical channel/emitter keeping the sight fully protected from the elements. The Acro P-2 was tested to withstand the extreme shock vibration temperature changes and material stress generated by firing over 20000 rounds of .40 S&W ammunition. Demands of professional users have been taken into account and are deeply ingrained in every part of the optic including the mounting solution. The Acro P-2 is ruggedly overbuilt to protect not only the enclosed electronics but the shooters aiming solution. Aimpoint dedicated a great deal of design and engineering into making the toughest pistol optic available. The optic incorporates 3 dimensional cues that assists the shooter in properly aligning the handgun in the direction of the target. This results in the red dot appearing on target with significantly less effort to the user. When presenting a pistol equipped with an optic the shooter relies on the appearance of the reticle/red dot. When it doesnt appear the cognitive tax is significant. Failure is more than a warranty issue. Specifications for Aimpoint OPMOD Acro 1x16mm Reflex Red Dot Sight: Manufacturer: OPMOD Color: Coyote Tan Finish: Anodized Fabric/Material: 7075-T6 Aluminum Magnification: 1 x Objective Lens Diameter: 16 mm Objective Window Size: 15x15 mm Reticle: 3.5 MOA Dot Illumination Type: LED Illumination Color: Red Brightness Settings: 10 Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 2 cm at 100 m Emitter Type: Enclosed Parallax: Free Optical Coating: Multi-Coated Light Transmission: 70 percent Battery Type: Lithium CR2032 Battery Quantity: 1 Battery Life: 50000 hours Operating Temperature: -45 - 71 Celsius -49 - 160 Fahrenheit Water Resistance Level: Waterproof Water Resistant Mark: 35 m 115 ft Shockproof: Yes Gun Make: Universal Gun Model: Universal Length: 47 mm 1.9 in Width: 33 mm 1.3 in Height: 1.2 in 31 mm Weight: 60 g 2.1 oz Condition: New Package Type: Box Magnification Type: Fixed Lens Finish: Multi-Layer Anti-Reflex Quantity: 1 Switch Type: Push Button Red Dot Sights-Footprint: Aim Point Acro Features of Aimpoint OPMOD Acro 1x16mm Reflex Red Dot Sight: 3.5 MOA dot size 50000 hours (over 5 years) of constant operation 4 night vision compatible settings and 6 daylight settings Weight 2.2 oz / 61 g (sight only) Submersible to 115 feet (35 meters) 3.5 MOA CR2032 Battery Compact Optic Optimized for pistol and applications which require a low-profile red dot system Package Contents: Aimpoint OPMOD Acro 1x16mm Reflex Red Dot Sight Front and Rear Lens Caps OPMOD AIMOPMOD: Acro Reflex Red Dot Sight 3.5 MOA Dot Reticle Coyote Tan