The EXPS3 HD builds on EOTech's holographic legacy with a refined, all-aluminum hoodless design that enhances peripheral awareness while maintaining fast, both-eyes-open engagement. The 0-reticle pairs a 68 MOA speed ring with a 1 MOA dot, giving you three aiming points calibrated for .223 Cal. 62 Gr. at 2,900 fps, with the ring also useful for approximating shotgun patterns depending on choke and shell type. A left-side rotary dial keeps controls clear of magnifiers and accessories, and a 1.74" centerline height sets up a lower 1/3 co-witness. Adaptive auto-brightness and shake-awake technology keep the optic ready without manual adjustment, while durable all-aluminum construction carries forward EOTech's proven reliability in a magnifier-ready package. Windage and elevation adjust in 0.5 MOA clicks, and the sight is water resistant to 33 ft. and rated for continuous use across a -40degF to 140degF operating range. A single CR123 battery delivers up to 1,000 continuous hours of runtime at the nominal setting. Hoodless, all-aluminum design maximizes peripheral awareness for faster, more natural target acquisition Left-side rotary dial keeps controls clear of magnifiers and accessories Adaptive auto-brightness with shake-awake keeps the optic always ready 0-reticle: 68 MOA speed ring with 1 MOA dot, calibrated for .223 Cal. 62 Gr., 2,900 Vel. 1.74" centerline height for a lower 1/3 co-witness Night vision compatible with 4 dedicated NV brightness settings Made in the USA 10-year warranty What's in the box: Optic CR123 battery Warranty card Quick start guide