The Trijicon RMR HD is an innovative red dot pistol optic specifically designed for the evolving needs of Law Enforcement and the Military. Built on the foundation of the Trijicon RMR Adjustable LED model, the RMR HD features the same patented housing shape made from forged aluminum, robust electronic system, and quality lenses. Adding a long-lasting, top-loading battery, larger window, an innovative forward looking light sensor, multiple reticle options, market leading illumination adjustability, and its clear the RMR HD is designed and built for duty use. This Product is subject to ITAR/EAR Export Controls. Please visit our ITAR/EAR page (click here) or Contact Us for more Information. The innovative forward looking light sensor gauges the brightness at target in auto mode and adjusts reticle brightness to be effective in any lighting scenario. A new reticle allows you to switch between a complex reticle or single crisp dot, both of which include a new super bright setting and an additional night vision setting. The RMR HD also allows the operator to adjust the Auto Illumination as well as the dot/circle contrast. Additional features include larger, more tactile buttons, new adjusters with greater audible and tactile feedback, and an expanded field of view. Offering the same footprint as the RMR and designed to fit most existing optics-ready duty holsters, the Trijicon RMR HD is ready for those needing a feature-rich optic with high performance and ultra-reliability 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. Upgraded windage and elevation adjusters: More tactile and audible clicks for tool-less zeroing. Rugged, durable construction: 7075-T6 forged aluminum housing; waterproof up to 66 ft. (20 m). Large, unobstructed field of view: Find the reticle with ease; parallax free. Reliability for everyday carry: Unique shape diverts impact force to protect lens from drops and bumps. Complete user control illumination settings: Eleven brightness settings with multiple modes, including 3 NV settings, for excellent visibility in any lighting condition. Clear target visibility: Advanced lens technology provides crisp field of view. Identical footprint as RMR: Mounts easily on popular red-dot-ready pistols using the same base as Trijicon RMR®. 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. TECHNICAL SPECIFICATIONS: Reticle Type: 55 MOA segmented circle with 1.0 or 3.25 MOA red dot Upgraded windage and elevation adjusters Rugged, durable construction Large, unobstructed field of view Reliable for everyday carry Top-loaded battery Complete user control of illumination settings Clear target visibility Identical footprint as RMR Improved controls Index ridge alignment aid Button lock-out mode Manual brightness lock-in mode Brightness response setting Forward-mounted light sensor INCLUDED IN THE BOX: Trijicon RMR HD 1x Reflex Red Dot Sight T10 Torx Key 2x 6-32x1/2 Torx Screws 6-32 x.380 Torx Screws Product Summary Guide Manual Warranty Card Sticker 2032 Battery Product Downloads Spec Sheet Miniature Red Dot Comparison RMR HD Buttonology QRG