Trijicon RMR HD Red Dot Sight 3.25 MOA Dot / 55 MOA Circle Reticle

Features:

• Top-Loading Battery: Battery changes are easy, with no need to dismount the optic; Uses common CR2032 battery with up to 3 years of battery life.
• Large Unobstructed Field of View:  Find the reticle with ease; parallax free.
• Clear Target Visibility: Advanced lens technology provides crisp field of view
• Upgraded Windage and Elevation Adjusters: More tactile and audible clicks for tool-less zeroing
• Reliability for Everyday Carry: Unique shape divers impact force to protect lens from drop and bumps. 
• Identical Footprint as RMR: Mounts easily on popular red-dot-ready pistols using the same base as Trijicon RMR.
• Rugged, Durable Construction: 7075-T6 forged aluminum housing waterproof up to 66 ft. (20 m) 
• Complete User Control Illumination Settings: Nine brightness settings with multiple modes for excellent visibility in any lighting condition. 
• Improved controls: More tactile and audible controls provide positive feedback when used with duty gloves. 
• Index Ridge Alignment Aid: Unique housing design provides built-in index point for fast sight picture acquisition even from atypical positions.
• Button Lock-Out Mode: Secures the Auto-Brightness Setting which is Ideal for Everyday Carry.
• Manual Brightness Lock-In Mode: Secures the User-Chosen Brightness Setting Indefinitely.
• Brightness Response Setting: Choose amongst Normal Auto (default), High Auto, and Low Auto adjust settings
• Forward Mounted Light Sensor: Enables the RMR HD Automatic Brightness mode to read the lighting conditions at the target, rather than just at the user.

Specs: 

• Length x Width x Height: 2.15 in x 1.27 in x 1.19 in (54.61mm x 32.26mm x 30.23mm)
• Weight: 1.69 oz. (47.91g)
• Magnification: 1x
• Reticle Pattern: 3.25 MOA Dot with 55 MOA Selectable Reticle
• Day Reticle Color: Red
• Night Reticle Color: Red
• Illumination Source: LED
• Illumination Settings: 9 brightness settings, 3 NV, 1 super bright
• Power Source: CR2032
• Battery Life: Over 3 years of continuous use in brightness setting 5, dot only
• Adjustment: 1 MOA per click
• Adjustment Range: 135 MOA Total Travel
• Eye Relief: Infinite in.
• Housing Material: 7075-T6 aluminum
• Operating Temperature: -40F to 140F (-40c to 60c)