Zero Tech Optics Thrive HD 1x28mmx20mm 3 MOA Red Dot Reflex Sight - High Mount

The Zero Tech Optics Thrive HD is a compact reflex sight built around a wide rectangular 28mm x 20mm objective window. Designed for rapid both-eyes-open target acquisition, it pairs a crisp 3 MOA red dot reticle with High Definition glass and multi-coated lenses to deliver a clean, distortion-free sight picture at 1x magnification.

This THDRS28H configuration ships with the high mount installed for direct attachment to a Picatinny rail, while still preserving the popular RMR footprint for co-witness and aftermarket compatibility. A shake-awake feature automatically powers the unit up and down to extend battery life, and user-adjustable brightness gives full control over the dot in any lighting. The sight runs on a common CR2032 battery and is rated for up to 50,000 hours of runtime.

Built tough for hard use, the Thrive HD is fog proof, shock proof, and waterproof, with a ruggedized housing that shrugs off recoil from pistol-caliber and centerfire carbine applications. The optic is trimmed to a compact 1.77" length at just 3.10 oz, so it disappears on top of an optics-ready slide or sits securely on a flattop receiver. Click adjustments come in 1 MOA increments on both windage and elevation, and unlimited eye relief lets the optic be mounted at any comfortable position behind the rail.

Whether topping a duty pistol, building a lightweight defensive carbine, or upgrading a competition slide, the Thrive HD brings high-clarity glass, dependable electronics, and a versatile mounting system in one package.